Building My Own PC

[naut]

I'm finally looking into building a new PC after much procrastination. This is my current thoughts so far (monitor/mouse/keyboard/speakers not needed):

Gigabyte GA-880GA-UD3H Motherboard $129.00
AMD Phenom II X6 1055T $199.00
Thermaltake Frio CPU Cooler $76.00
G.Skill Ripjaws F3-12800CL8D-4GBRM (2x2GB) DDR3 $99.00
PowerColor Radeon HD5870 PCS+ 1GB $339.00
Western Digital Caviar Blue 1TB WD10EALS $69.00
ASUS PCI-G31 54Mbps 802.11b/g Wireless PCI Adapter $21.00
CoolerMaster GX 750W PSU $119.00
Antec Three Hundred Case $59.00

Total: $1110.00

Spoiler Alert, click show to read: 

Mobo: GIGABYTE GA-P55-USB3 LGA 1156 Intel P55 USB 3.0 ATX Intel Motherboard

CPU: Intel Core i5-650 Clarkdale 3.2GHz 4MB L3 Cache LGA 1156 73W Dual-Core Desktop Processor BX80616I5650

Fan/Heat-Sink: ARCTIC COOLING Freezer 7 Pro Rev.2 92mm Fluid Dynamic CPU Cooler

[Seems I'll be able to overclock the CPU with that heat-sink, to get some extra juice.]

PSU: CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC

GPU: GIGABYTE GV-R577SO-1GD Radeon HD 5770 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card

HDD: Western Digital Caviar Blue WD10EALS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive

[I have some older drives that I can also use for back-up purposes, the mobo I picked will be able to handle them as well I assume?]

RAM: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-4GBRL x2

CD/DVD: I'll have to check my parts box, I think I have a spare old one, if not I'll pick up an Asus or Sony one locally for $20~

Case: NZXT Apollo Black SECC Steel Chassis ATX Mid Tower Computer Case

OS: Win7 Pro, for the XP compatibility mode, I'll have to shop around, no doubt there'll be student deals here somewhere.

Total Price: US$950.9 + cost of Win7 + import tax and shipping

So is this any good? Can anyone point me in a good direction sound card wise?