HTPC build: What do you think?

Hello everyone,

I am planning to build an HTPC for my new 42" Vizio TV. I have a basic parts list and want to know what you all think.

1. Processor - Intel i3-3240 @ 3.4 Ghz (Lga1155)
2. MOBO - ASUS P8B75-M/CSM
3. Ram - 6 Gb Corsair XMS3 DDR3 1333 Mhz.
4. Power - Cooler Master eXtreme Power Plus 500w
5. Storate - 120 Gb Samsung SSD
6. Case - Rosewill Dual Fans MicroATX Mini Tower FBM-01

Now, the issue at hand. Graphics.

I can either use the integrated Intel graphics (B75 chipset, HD 4000 graphics maybe?) or get a Nvidia graphics card. The only reason I would want to get a dedicated card is because the integrated graphics only support 1920 x 1200 @ 60 Hz while my TV is 1920 x 1200 @ 120 Hz. There IS a big difference between 60 and 120 Hz.

I was thinking about getting a EVGA GeForce GTX 660 SUPERCLOCKED card but would it fit in the case? Is the 500w supply good enough (I am 95% certain it is)? Is there a better deal somewhere?

I want to have KDE and XBMC on it. All movies are on an external drive. (May connect it to the router. )

I am not sure how to know for sure whether your video card would fit in the case or not.

The power supply is sufficient (http://eu.evga.com/products/moreInfo.asp?pn=02G-P4-2662-KR&family=GeForce+600+Series+Family&uc=EUR). In the link, it says a "minimum of 450 watt" power supply and your power supply is 500watts.