Edited in to the top for importance:
Just looked at your PSU, if you honestly plan on running 2 GTX 480s you'll probably need a bigger power supply. A typical load draw on one of those cards is 465 at stock for one (see link here:
http://www.hardocp.com/article/2010/...0_sli_review/7). Draw for 2 cards isn't equal to one times two, but you will still see a significant jump in power needed, up to occasional spikes near 700 I would guess. And generally these spikes would occur in high graphical areas when the CPU is also working hard and also needs more juice. On top of the GPU requirements you'll want a good 250-300 for everything else. So, personally, I would get a minimum of 1200 if you are planning on 2 480s. Also, watch the GTX 480 noise/temp test on that site I just linked for an idea of the temp/noise factor that you'll get with a stock GTX 480 (not nearly as bad with the Zotac one I link below):
You may be able to sqeak buy with a 1000 watt PSU, but don't expect to overclock them very much and expect potential crashes in very demanding graphical areas of games.
Your system is very similar to my system so I'll give my best input on what I enjoy/would change about mine and answer some of your relevant questions.
As far as i7 930, it is a very powerful processor and going up to the next step will cost you a decent amount more money especially compared to the performance it will get you. Your 930 shouldn't bottleneck the 2 GTX 480s if you do a decent overclock on your CPU.
i7 930s are also one of the easiest CPUs to overclock that I have ever owned. I have mine and my fiancee's at a easy 4.0 sitting at about 72c after hours of prime95 stress testing (this was on a summers day on the 3rd floor of a California house with no air conditioning, so pretty high ambient, I haven't bothered to do that long of a stress test since then). You can generally get these processors way up without having to push the voltages too high and if you have the right cooling (which you are planning on getting) you shouldn't have any problems.
The Antec1200 will fit that cooler. If you aren't planning on getting some fans I would do that. Get a good push/pull going through your case. Depending on how loud/quiet you want your PC (and if you are planning on staying on stock fans for your GPU I would say loud). As for fans for maximum performance/noise Scythe Kaze 3000 do the best cooling, but I personally prefer Coolermaster R4s for a decent price, whisper quiet and decent CFM (wouldn't recommend putting them on a radiator or anything though due to low static pressure).
For thermal paste I generally prefer Arctic Silver because it is high performance/low cost. But many companies have done huge comparisons. Here is a good example of that (from benchmark reviews):
http://benchmarkreviews.com/index.ph...1&limitstart=6
As for graphics cards. I personally would start with 1 card and move on to 2. Currently the beta is having some issues with Nvidia cards and temps, but that will hopefully be solved by the time of release. The card you have is a nice card, but it is a reference card and they are notoriously hot/loud (some may dispute that here, but compared to other cards on the market they are very much so). It is the reference model, most models like that will largely perform the same. I have read many reviews of people who have used GTX 480s and the Zotac AMP with custom cooler has seemed to be a favorite of many people with 480s. The cooling is far superior to the reference cooler in terms of temperatures and volume, and because the temps are generally lower it is easier to overclock. Only draw is that it is a little bit bigger so fitting it in for SLI will be more challenging depending on the room at the bottom of your PC. Here is a link to that card if you are interested:
http://www.newegg.com/Product/Produc...-166-_-Product
As to your RAM, that was the RAM that I chose to go with for my set and I couldn't be happier. I was actually able to tighten the timings fairly easily for my overclock and not seeing any issues.
As for monitors, 16:10 is the way to go. If you want huge at a low price this is a good monitor:
http://www.tigerdirect.com/applicati...558&CatId=3774
The outside looks a little unpolished but all in all it is a sweet monitor for the price. Hard to beat 16:10, 28" and $250, the only draws would be that it is a less reputable company (though they do fill contracts for the much larger HannsG), looks a little like an office monitor and not the pretty smoothed off finish of a monitor such as a Samsung RoseBlack, and has a 3ms refresh rate (which is still good, but some have 2ms).
Hopefully that helps with some of your questions. Good luck with the build!