Hokay. I'll run down point-by-point.
MOBO: The one you picked is solid, but overpriced. The ASUS M4A77TD has everything you could ever want out of a mobo (unless you have some special needs like a 1394 port or multiple IDE ports or something), and for considerably less money.
TV Card: A solid, reasonably priced pick. ASUS is an excellent hardware manufacturer and I highly encourage people to buy from them every time.
Graphics Card: If you're running at a resolution above 1600x1050, then you picked an excellent card. If you're running lower than that, then save yourself a few bucks and get a Radeon 4850 like this one.
RAM: 8 gigs is WAY too much. You won't see a performance increase on most games above 4 gigs. This kit will have your rig running games just as well as the 8-gig one you chose, and it'll save you over a hundred bucks.
CPU: Okay, here's where it gets tricky. You do NOT need to spend over $100 on a CPU if the most CPU-intensive thing you're using your PC for is gaming, so that Phenom is WAY overkill. I say this in every "help me buy/upgrade a PC" thread, and I'll say it again: The Athlon II X3 435 is all you need for PC gaming for the foreseeable future - as in, it'll run every modern game (save ArmA II and GTA4 and maybe one or two others that are equally poorly programmed/optimized) at max settings, provided you have a good enough graphics card. If you really want to run those few stragglers too, then Intel's Core i5-750 (and a compatible mobo) are what you should get, but otherwise just stick with the Athlon.
OS: Windows 7 x64 is the best version of Windows out there right now. Go for it.
TOTAL: Roughly $620 before tax and shipping.
Put that extra $250-ish away and use it to upgrade again in a few years when the higher-end parts you picked will be both needed and much cheaper.
"'Casual games' are something the 'Game Industry' invented to explain away the Wii success instead of actually listening or looking at what Nintendo did. There is no 'casual strategy' from Nintendo. 'Accessible strategy', yes, but ‘casual gamers’ is just the 'Game Industry''s polite way of saying what they feel: 'retarded gamers'."
-Sean Malstrom
