You don't need a 750w psu to run two of those cards. A decent 650w will do just fine and give you juice to spare. Also maybe look into a larger case if you do plan on running two of those cards and adding an after market heat sink.
CM 690 would be in your price range, much larger, and has the blue LED fans. I believe it's on sale atm @ newegg
Look @ Antec, XFX, and Corsair for a decent 650w psu on the cheap.
It's a good list. Everything is compatible. You can skip the extra case fan. You probably won't need it even if you add a 2nd 6850 in the future. No problem dropping down a PSU size with a high performance 650W gaming PSU.