i guess best performance for 2 screens would be 2 gtx460 (non sli .. 1 card for the main screen 1 card for the slaves at the second) .


but my personal tip for max boxing performance would be 1 gtx460 oc (i use a gigabyte gtx460/1g OC II for 2 1680x1050 screens ~50fps @ main and 4x20fps for the toons ... i guess my good old core 2 quad is the slow part in my system ;/ ) and a ssd ..

if you use a 30" tft then the gtx460 will still be fast enough for wow (even 5x) but will get problems with things like crysis and other highend games.

for the PSU .. a GOOD 550W should do it if u dont plan to buy 580gtx/that dual gpu ati monster cards . the important part is the GOOD .. so no 20 buck psu ;D