The HD 3870 is not better then the 8800GT. Just cause it has better paper stats don't mean its better. Check out these game results for both.
bit-tech.net | R680: AMD ATI Radeon HD 3870 X2 - Introduction
Go to the game result pages, the first is Crysis. And I have no desire for crossfire/sli.
wel my bad on that...i forgot to edit my post.
the 3870 is better in crossfire when comparing to sli gt's.
well if your interested in the evga gts 512 get it here
Newegg.com - EVGA 512-P3-N841-AR GeForce 8800GTS (G92) 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail
and apply this code to get more off: EMCABCKAG to get $15 off.