Maximum PC

just looking for some pointers on a build I've been looking at. some questions. am i going to be ok as far as heat goes, or should i look into some upgrades. also wondering about the sli, haven't ever done it before but looking at benchmarks it seems the way to go. i have heard some things about micro-stutters from sli, and that its more trouble than its worth, so anything about that would be helpful.
this will only be the second build I've ever done and the first one was pretty basic. i mainly want to use this for gaming probably not running on more than one monitor at 1920x1080. any advice is welcomed as i am pretty new to doing this so feel free.
another thing someone might be able to give me advice on, i have no experience overclocking anything, not that im looking for a walkthrough (unless you know a link), but just wondering if it would be needed to run something like bf3 ultra settings (been seeing that its pretty intense) in 1920x1080 or if i wouldn't really need to worry about it.

or if you want just tell me its a terrible build and recommend another that will cost me around the same - i'm open to suggestion

build specs -

Case: CNPSCM-RC-922XM-KKN1 - Cooler Master HAF XM System Cabinet
3rd Gen Intel® Core i7 I7-3770K 3.5Ghz CPU
Asus P8Z77-M PRO Desktop Motherboard - Intel Z77 Express Chipset
Cooler Master GeminII S524 Cooling Fan/Heatsink
Power Supply: - Corsair TX850W ATX12V & EPS12V Power Supply 850W
Sound Card - Sound Blaster X-Fi Xtreme Audio
Crucial Ballistix Sport 16GB DDR3 1600Mhz DDR3 (8Gx2)
Western Digital Caviar Blue WD10EZEX 1 TB Internal Hard Drive
Crucial CT128M4SSD2 128 GB Internal Solid State Drive
2x ASUS GTX660 TI-DC2-2GD5 GeForce GTX 660 Ti 2GB 192-bit GDDR5 sLI
Optical Drives: LG GH24NS50 24x DVD�RW Super Multi Drive
OS: WINDOWS 7 Home Prem 64 Bit
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