Took me a few GCards, mobos and CPUs to get straight with pcsx2 and Dolphin - but this setup works great:
Intel Core i7 920 @ 4Ghz (OC'd)
Gigabyte EX58-DS4
Corsair 1333 DDR3 - 6GB
KFA Nvidia GTX-660 EX OC 2G DDR5
Sound Blaster X-Fi Xtreme Gamer Fatal1ty Pro
Corsair CX500 CX 80+ Bronze 500W PSU
Zalman CNPS9900-MAX Red Ultra Aero Flower
Most older components can pick up cheaply recon or 2nd. Made massive difference to me cab

(when it's finally built!)
btw - creating mame snaps? You checked out EmuMovies?