Let him choose then. I was trying to stay within his budget. My build came in at $1700 with peripherals and yours came at $1900 with no peripherals. 2 r9 290s will last longer than two 770s. This is because of AMDs build quality. I'm not calling Nvidia bad or anything, i'm just saying that they're overpriced for the amount that they cost. A r9 290 would have a better price to performance ratio than a 780. Al 280X will have one comparable to the 770