Alienware vs...

I've recently been looking for a new computer and have finally narrowed it down to these two. Although I am unsure as to which to go with. I'm looking for a computer that will be suitable for present and future games. Powerful, Fast and Stable. I previously posted this information on another forums, but a friend in game said it would be wise to post here as there is a larger member base and, there are far more within those members who know more about hardware. I for one know very little.

Brief history on the two:
Komplett is a company I've used for a while for things like mice and keyboard. I've also used them for my current soundcard and graphics card. I've found them to be quite reliable and speedy with their deliveries.
Alienware is a company I've never used before, but I've heard they are meant to be the top company for gaming desktops. Also from others that have Alienware computers, I have been told they are excellent with dealing with Alienware issues and faults.

The reason I'm posting this here is because, I would like suggestions on which computer to get. Presently I'm leaning towards the Alienware computer, but I would like the opinions of those who know more about gaming computers. When looking through this, please do not make suggestions such as 'Build one yourself', as I said, I am useless with hardware. Also please don't direct me to other sites to have one built. Where I first posted this, it was done and to the majority, the sites wouldn't deliver to the United Kingdom, they was all US based. Also, the UK and US use different plugs and sockets. So please stick with these two unless you are in the United Kingdom and have a suggestion.
Oh and, when looking, imagine both computers are below your budget. If you look at the price, look more so at the "is it good value for money" aspect of it. ^_^

Thank you to those who read this, and thank you even more so to those who make a response that helps me in my decision of which to buy.

Much luv,
Kaline Lycia

Desktop One: Komplett Opteron Workstation ( http://www.komplett.co.uk/k/config.asp?ConfigSystemId=10131 )
* Chassis - Silverstone SST-TJ05B-T E-ATX, Black, Aluminium Front (Without PSU)
* Power Supply - Seasonic S12 Powersupply 600W, 120mm Fan, 4xSATA, ATX/EPS, SLI, 20/24pin
* Mainboard - MSI K8N Master2-FAR, nForce4 Pro2200 Socket-940,2xGbLAN,ATX,Dual-CPU,PCI-Ex16
* Processors 1 - AMD Opteron 280, 2.4GHz, 2way Socket 940, 2MB, BOXED w/fan
* Processors 2 - AMD Opteron 280, 2.4GHz, 2way Socket 940, 2MB, BOXED w/fan
* Memory 1 - Corsair PC3200 DDR-DIMM 1024MB ECC REG 64Meg x 4, CAS 2.5, "Low Profile"
* Memory 2 - Corsair PC3200 DDR-DIMM 1024MB ECC REG 64Meg x 4, CAS 2.5, "Low Profile"
* Memory 3 - Corsair PC3200 DDR-DIMM 1024MB ECC REG 64Meg x 4, CAS 2.5, "Low Profile"
* Memory 4 - Corsair PC3200 DDR-DIMM 1024MB ECC REG 64Meg x 4, CAS 2.5, "Low Profile"
* Graphics Card - Club3D Radeon X1900XT 512MB GDDR3 PCI-Express, Dual-DVI-I, VIVO, CF Ready
* Hard Drive - Seagate Barracuda 7200.9 500GB SATA2 16MB 7200RPM
* Hard Drive (additional) - Seagate Barracuda 7200.9 500GB SATA2 16MB 7200RPM
* Floppy - Sony Floppy Drive, 3,5" 1,44MB Black, Internal
* Optical Drives - Samsung DVD±RW burner, SH-W162L, 16x, Dual, LightScribe, Black OEM
* Optical Drives (additional) - NEC DVD±RW burner, ND-3550A, 16x, Dual, Black OEM
* Sound Card - Creative SB X-Fi Elite Pro PCI, 64MB, 116dB SNR, I/O, 3DMIDI, EAX
* Operating System - Microsoft Windows XP Professional SP2 Software English OEM
* Office - Microsoft Office Professional Edition 2003 SP2 English Software OEM
* Mouse - Logitech G7 Cordless Laser Mouse, USB
* Keyboard - Logitech Cordless Desktop MX5000, LCD-display, Retail, Keyboard/mouse
* Monitors - Samsung 21" LCD Syncmaster 214T, DVI-D, D-sub, S-video, Silver, 8ms
* Speakers - Creative Inspire T6060 (5.1 Speaker system)
* Networking - CNet PCI Gigabit Ethernet Adapter 32-bit PCI,Realtek RTL8169S
Price: £4194

-Or-

Desktop 2: Alienware: Aurora 7500sli ( http://www.alienware.co.uk/product_detail_pages/Aurora_7500/aurora_features.aspx?SysCode=PC-EU-AURORA-7500&SubCode=SKU-DEFAULT )
*Processor - AMD Athlon™ 64 FX-60 Processor with HyperTransport and Dual Core Technology
* Operating System - Microsoft® Windows® XP Professional with SP2
* Warranty - AlienCare 4-Year Free Phone 24/7 and Collect & Return w/ AlienAutopsy / Respawn (in English)
* Chassis Upgrade - Alienware® Liquid Cooling with AlienIce™ 2.0 Video Cooling (Fusion Red)
* Power Supply - Alienware® 650 Watt ATX 2.0 Power Supply with Active PFC
* Motherboard - Alienware® nForce™4 SLI™ x 16 Motherboard
* Memory - 2GB Low Latency DDR PC-3200 at 400MHz - 4 x 512MB
* Video Card - 512MB PCI-Express x16 ATI RADEON™ X1900 XTX
* System Drive - 1TB Serial ATA-II 3Gb 7,200 RPM w/32MB Cache (2 x 500GB) - RAID 0
* Storage Drive - 500GB Serial ATA-II 3Gb 7,200 RPM w/16MB Cache
* Optical Drive One - Premium 16x Dual Layer DVD±R/W Recorder
* Optical Drive Two - Premium 16x Dual Layer DVD±R/W Recorder
* Sound Card - Alienware® Edition Sound Blaster® X-Fi® High Definition 7.1 Audio with XRAM Technology
* Network Card - Integrated High Performance Gigabit Ethernet Adapter (DSL-ready)
* Floppy Drive - 1.44 MB Floppy Drive - Black
* Additional Storage - Alienware® USB 2.0 4GB Flash Drive
* Productivity Software - Microsoft® Office 2003 Professional
* Security Software - Kaspersky Anti-Virus Personal Professional
* Keyboard - Logitech Internet Keyboard UK
* Mouse - Logitech® MX™ 1000 Laser Cordless Mouse - UK Plug
* Monitor - 19" LCD Samsung SyncMaster 930BF Black Ultra Fast - 4ms response!
* Speakers - Creative® 7.1 THX® GigaWorks™ S750
* Extras - Alienware® Cable Management System, AlienAdrenaline: Video Performance, AlienInspection - Exclusive Integration and Inspection, AlienWiring - Exclusive Internal Wire Management, Alienware® T-Shirt - English.
Price: £5,418

You might wanna look at http://www.cyberpowerpc.com/ .

They are typically much cheaper than Alienware and allow you to build from the ground up with all the best components.

I gave the link a once over but, like links I've been given over the past week, they only ship to the US. *sighs* It sucks being English sometimes.