Well i must say this Vis Tek 4870 GC plays SL smooth as a babys azz... havent had one hiccup.. better than the 3870x2 by a long shot, and better than the 9800 gtx as well, using hte 8.6 drivers for it, with the fan profile tweak and runs just fine.. i hope everyone else has the same results that have this card..
ps.. i have both the nvidia setup and the other ati card,, and this was running on ultra high at29 - 40 fps avg in a populated area more than 10 avs, lol
pps.. And the drivers for the 48XX series are immature still so i can imagine it will get better and will no longer have to use the fan work around.