Not bad... ATI's crap to me, but, with AMD owning them now, I cannot say for the newer cards. [Used to the old school ATI. Yuck!] As far as the hard drive setup? Personally, it's suicide. 'cause there's nothing worse then loosing your primary system drive, yes... but loosing your primary AND backup drive? Even worse.
What I'm trying to say is that you shouldn't have it set up to where your main drive also stores, say, your DVD backups.
Roll with me here.
Ok, Windows constantly read/writes to the hard drives, yes, that's a given. But, the 'Windows drive' is read/wrote to prolly 10x more or times MORE then other drives in another channel. So, in essence, that means if your system drive dies, ALL your data is lost, and likely never to be recovered, unless you are planning on paying... what's the going rate... $100/Gb?
The solution? Simple!
What I'd highly recommend is maybe a 80-120GB SATA drive as your 'primary' drive, and set that TB drive in your secondary channel. So, in that case, if the Windows drive fails, no big deal. Just send it in for a replacement, re-install Windows, and all your data's still safe on the non-effected TB drive!
Now, you'd ask 'How would you even know?'. This is simple. I am ALWAYS given hand-me-down everything-s. Old computer, hard drive, etc. [Looking for work hinders my ultimate rig building, or rather, ANY rig building, ya know?] I go and buy a nice large drive to store my crap on, and use the old drive for my Windows stuff... 'cause there's a chance the computer will fail, or something, so, why not have a backup plan in motion?
My current main drive I've had for about 5 years, you will prolly laugh at this... is a 20GB drive, then a 'backup' 180GB IDE, THEN my 1TB drive that holds my films, data, and games. Granted, the scenario I've given is a bit... shaky, but, the theory is sound.
The less strain on your 'big boy' hard drive, the happier it is, and the longer it lives. The more strain... you get the idea.
As far as the rest of it, not bad, but, keep in mind that ALL PCs have USB 2.0 now, no real need to mention that. And, maybe I'm a bit old school, but, I'd kill ya if you try to install a WiFi card in my compy.

Wired all the way!
Oh, one quick question, however... is that 'High Defonition' sound card you have Real-Tek? I hate that company SO much. x.x;;; My last compy actually had on-board optical 7.1 output made by Crystal soundMAX or whatever. o.o Rare 'un.
Have fun gaming on it, tough!
-Haz