If I were you, I'd wait until the new Nvidia graphics cards came out so that maybe you could afford an ATI 5000 series when the prices drop. What kind of budget are you looking at anyway? Because you could probably get an i7 with an X58 board, which would be better especially if you're going to be doing SLI or Crossfire in the future. You might want to get another identical hard drive as well and put them in RAID0, just to make it that much faster. Other than that, though, it looks good.

Except I'd personally run out and get a blu-ray drive as well, but that's just my own preference. I like watching blu-rays in 1920x1200 resolution on my computer, lol.

I agree with Vortex that you might wanna wait a bit for competion to heat up=price drop
No I would not get another HDD for Raid 0-Raid 0 is extremely risky and if it crashes you just lost EVERYTHING on both the drives. One SSD or 7200rpm HDD is plenty for average user.
Yes you could up to the x58 platform by changing to OCZ ram which would save you like $75-$100+going to microcenter if one is near you.

other than that looks like a great build!

Come on...extremely risky? How often to hard drives fail? Not to mention if you only have one hard drive and it fails you just lost everything anyway. Is there more of a chance of a hard drive failing if there is more than one, well sure, but the risk is not that great.

Rodney has even said that he's been running RAID configurations for years and he's never had a hard drive fail on him. Just make sure you back up all your important files on a flash drive, external hard drive, or rewritable DVD or blu-ray disc.

Not to mention that SSD's are extremely expensive. If you have the money though, it might be nice to a cheaper one that has a small capacity to put only your OS onto.

Hard Drives fail aprox 1/25 I think but it's not the likelyhood of it failing but what happens when it does fail that scares me. In a non-raid setup I can easily recover any and all data on my HDD but if it was in raid I've lost everything.
A 74gb SSD for OS+some games can be found for like $150+it will be faster than raid

I would not worry about the HDD's failing. Sure it's a possibility, but there are tons of other possibilities for something to go wrong besides the HDD's failing. The build looks good but you may want to consider saving up a tiny bit more for an HD 5850. When I purchased my GTX 275 (similar to an HD 4890), the HD 5xxx series was not out. If they were out, I would have purchased one of those because they are better for the price. Now, there is nothing wrong with a HD 4890, I am sure it will run anything you throw at it, it's just that there are cards on the market that offer better features and performance for not too much more.

Having said all of that, the build looks just fine and everything seems compatible.

a. Consider getting 8-8-8-24 RAM (you can get G.skill with lower timmings for the same price and even less and trust me - go with G.skill they are just as good).

b. HIGHLY consider getting the HAF922 or even better the HAF932.

c. EXTREMLY consider getting 2xHDDs in a RAID0 Config. if you don't have money for that - get 2xWD Caviar Blues 2x250gb (shouldn't cost much more).

d. Get a HD50xx GPU. either the HD5770 or the HD5850 - its gonna be worth every penny in terms of preformance and futureproofnes!