Need a PSU and Advice on my $850 gaming/everyday Intel build

Attempt at the biggest bang for my intel buck
Processor: Intel
Core i5 3570K 3.4GHz LGA 1155 Processor (169.99 @ Microcenter)

Motherboard: AS Rock LGA1155 Z77 EXTREME4 Motherboard (127.99 @ Amazon)

RAM: PNY XLR8 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) (34.99 @ Newegg)

Graphics Card: GIGABYTE GV-N66TWF2-2GD GeForce GTX 660 Ti 2GB 192-bit GDDR5 PCI Express 3.0 x16 HDCP (279.99 @ Newegg)

Hard Drive: Sandisk 2.5" 128GB SATA III Internal Solid State Drive (SSD) (84.99 @ MacMall)

Case: APEVIA X-SUPRA G-Type X-SUPRAG-BL Black / Blue SECC Steel ATX Mid Tower Computer Case (52.98 @ Amazon)

Power Supply: I need your help finding one that will support sli with all this and another 660 ti! trying to stay at $75

I am going to be gaming on this at 1920x1080 resolution and using it to do every day things such as college work and regular browsing. i play everything from skyrim and wow to cod and bf3, all at max settings. please advise me on a psu and any other info that pops into your head! thanks!