That's a beautiful rig!!!
Really wish I'd done more research before buying my 2 580s. It sounds stupid now but I thought 1.5GB across 2 cards is 3GB and that 3GB would be more then enough to play any game at 5760x1080.
Nope! most games I have to lower the AA settings because 1.5GB just isn't enough. Thought about selling and getting 2x 3GB cards but with the potential losses involved I might as well wait until the 680 is out.
BF3 though I can play on max setting (so it can't use a massive amount of GPU memory) but only get around 30FPS.
I also recently got into photography and just bought a Canon 550D! I feel your financial pain