sure,the 7600 is a great card,but it still doesn't come close to the 7800gs.although the 7800gs is a significant amount of money,it offers great graphics and you might even decide to hold off upgrading for awhile longer.unfortunately i didn't wait and so i missed out on the 7800gs.if i had waited,i probably would still be in my old system.but alas,the 7800gs didn't come out till i had bought my 7800gt and new mainboard.but still i now own two 7800gt's and run them in sli.i think i'm doing good.but you would do well to purchase the 7800gs for the best performance.
Dahak
EVGA NF4 SLI READY MB
2X1GIG DDR400 IN DC MODE(128BIT)
2 7800GT'S IN SLI MODE
WD300GIG HD @ 7200RPM
X2 4400+@2.4 S-939
520WATT PSU
EXTREME 19IN.MONITOR