Time to release the hounds

So I ran into a slight problem that only you guys can help me out with.

I recently purchased a 2560x1440 monitor, and it's GPU upgrade time. Current system is

AMD 6300FX with OC
Micro ATX board
Micro ATX case
850W Corsair PSU
8GB DDR3
GTX 660Ti

My plan to run games on this ridiculous monitor is adding a 2nd 660, However, due to space constraints... I need to run micro ATX.

I can't seem to find an AM3+ board with 2 pcie slots in the mini ATX form factor. I could go intel, but i would have to sell my CPU and board to finance it, and the 6300 I have works surprisingly well for what i paid.

Looking for advice and your thoughts.

thanks for the help guys!