the NVIDIA will be priced more than likely around £450, it is as someone said basically two 8800GTS with onboard SLI, cards designed like this don't really do too great, remember the 7950GX2, was fast but was it twice as fast as 7950GT, i don't think it was, however there is a LOT of hope for the 3870X2, read a while back about the sapphire X2600X2 (two 2600 series) and in most tests it was actually more than 100% faster than a single X2600, which is impressive considering they were £125 or so, double 2600 is that closing in on the 2900? plus they only used a single six pin power connector, so based on that im guessing the 3870X2 will be very fast card, maybe even faster than two 3870s in crossfire 
