By your logic...
No logic. I'm no expert. Industrial controls - call me. GPUs, after a 512k 8800GTS I will always go for more RAM. As noted, my multi-monitor is 3GB nvidia gear, not AMD. if NV 680 can do 3880x1200 with all maxed I'm impressed, make it 5x 19x12 in portrait and i'm sold - regardless of RAM, but I just can't help thinking more is better in this battle.