Building new rig, curious about some things

Hey all,
I'm currently near the end of my first ever gaming PC build. I just have a few questions about some things that I'm curious about.

My specs are:

Mobo - Asus P8Z68-V PRO/GEN3 LGA 1155

CPU- Intel i5-2500k Sandy Bridge 3.3GHz stock (3.7GHz turbo)

GPU- MSI Radeon HD 6950 Twin Frozr III 2GB OC/Power Edition (About to purchase another for crossfire)

PSU- ThermalTake Black Widow 850W

Case I plan on getting- Cooler Master HAF 922
http://www.newegg.com/Product/Prod [...] 6811119197

Besides the second card for crossfire all I have left to buy is the RAM and HDD.
I wouldn't mind some tips on what to get, at the moment I'm looking at:
2x corsair vengeance 8GB (2 x 4GB) 240-Pin DDR3, to total 16GB of ram..

http://www.newegg.com/Product/Prod [...] 6820233180

I'm not too sure about HDD's though, all I know is I'd like a 1T 7200 RPM with a 64MB cache, and that's about all I know, so any pointers on what to get are welcome.

Anyway some random questions out of curiosity I have are:

1. Could this rig run games like Battlefield 3 or Crysis on ultra, (no AA or extras) on eyefinity with three 42" tv's on 1080p? Or if not on 1080p, on any resolution at all? I realize three 42" is a lot to run which is why I'm asking..

2. Just curious, are Computer monitors better quality, say for eyefinity, than tv's for gaming? (Besides the fact that 2ms response time is much better than 6.5+) Cause I'm trying to decide either three 42" LCD Tv's.. or three 27" LED monitors from the link below:.. I know the monitors would probably be better but three 42" tv's would be so epic..

http://www.bestbuy.com/site/Samsun [...] Id=2099051

3. Would this rig run eyefinity on BF3 or Crysis on ultra 1080p on the three 27" monitors ok?

I think that's about all I can think of for now.. Thanks very much in advance to anyone who answers any of these questions.

should be fine. I can run bf3 on high setting on a gtx295 which is ancient