Why Intel?
Thier problem is that they change sockets on you very often. If you want to upgrade the cpu, you have to upgrade the mobo. AMD have gone down another route. I can still fit AM2 and AM2+ cpu's into AM3 sockets for christ sakes. And it works.
Lmao. I have that same exact case in that link. Now, I'll give you my AMD recomendations and why.
http://www.newegg.com/Product/Product.a ... 6819103808
$159.99 AMD Phenom II X4 955 Black Edition Deneb 3.2GHz
You can get all those really really powerful CPU's, but what for? Unless your doing lots of encoding or something else CPU intensive, you'll find that you just wont use that much CPU power. Intel have the performance, AMD have cheaper but more upgradeable parts. Yes, I realise a "3.2GHZ quad core" is powerful, but its power for its price. "Black editions" cost a little bit more, but have unlocked multipliers, which means you can achieve some crazy clock speeds! There is a 3GHZ non-black edition for about $20/30 cheaper but it doesn't seem worth it. You'll probably want an aftermarket CPU cooler though, as stock fans tend to be noisy.
Motherboard:
http://www.newegg.com/Product/Product.a ... 6813128444
$104 GIGABYTE GA-880GA-UD3H AM3 AMD 880G HDMI SATA 6Gb/s USB 3.0 ATX AMD Motherboard
It's the cheapest USB 3 + 6GB/s Sata AM3 mobo, has inbuilt video for bonus should you ever need it. I have a similar board (lacks the USB3/Sata 6gbit) but it's the same for the most part. The onboard audio will do you fine, as I had an XFI in that recently kicked the bucket, so I went to onboard audio. After messing with the EQ, the sound quality is *close* to the XFI, close enough for me and I consider myself a low-end audiophile

. In other words, there seems to be no point buying a dedicated sound card, especially when you consider all the issues creative cards bring with their drivers.
Video cards. Well, they are all pretty much the same in a series, some have extra this or a little extra that. A 5770 series (NOT a 5750) will be able to run most games on very high-maximum settings @ 1920x1200, and can have certain levels of AA/AF applied. Just don't expect to max out the AA/AF. For $150 it's a snip. You could get a 5850, but your paying twice as much just to get AA/AF. It may be important to you it may not be. Just make sure the card has 1GB of memory and is not Asus, as their products seem to fail so easily these days. *sigh.
Just stay away from crossfire/SLI. Why? Well, both of them DO give you extra FPS. However, not all games support them, and they do cause compatibility issues. They add power draw and can cause stability issues, and ontop of that, it's performance is usually close to just getting a single card for the same money as 2x weaker cards. No matter what you say, you wont notice 10fps difference above 60fps. Hell, most LCD's can't refresh faster then 60fps anyway.
http://www.hardware-revolution.com/hard ... rsion-2-0/
The rest of the build seems pretty alright. I'd look into getting a more powerful power supply however, like that Corsair one listed underneath.. Sure, you might not need it yet, but when you do you'll be thankful. 4GB or 6GB of memory? If your looking to overclock, in the past you used to need more expensive memory that can handle the load. If that is true or not these days I don't really know, hunt around.
The items I listed will save you about $200, and is nearly identical to my current rig. Really, It's only $200 cheaper mostly because of the cheaper video card. It's not as fast, but it'll do the job for gaming upto 1920x1200. If you want to future proof/game at higher resolutions, you'll probably want a 5850.
Don't forget you'll need a monitor, keyboard + mouse, etc. It's tempting to go cheap on the monitor, because believe me, you will get a degraded quality picture. I got this 26" very, very cheap. It's almost too big, and frankly I'd rather get a decent 24" for the same price. 22" tends to max out at 1680x1050, and 24" maxes at out 1920x1200, which fit the video card I listed earlier.
Get a list made up and put it up and I'll suggest any changes I think are needed.
edit: Apparently, black-edition CPU's don't come with fan/heatsinks. I don't know, I thought mine did. In either case, check this out. I'd recommend throwing in a $40 aftermarket fan anyway, as they usually are far better then stock fans.Anything from
Zalman would do fine, but double check that it fits the AM3 socket first.