Help with my new build (DDR2 vs DDR3)

Cpu- Phenom II 955 AM3
Mobo- Asus M4A79 or M4A79-T Deluxe
Ram- 8gb G-Skill DDR2 1066 or 8gb G-Skill DDR3 1333
Case- Antec 1200
Graphics Cards- Waiting for 5k series Radeon cards
Power Supply- Waiting for 5k series Radeon cards, most likely PC Power & Cooling 860w or Antec TPQ 850 unless I need more power
HDD- looking to get a Velociraptor as my windows HD and a pair of 640gb Caviar Blacks for storage alongside my 500gb Caviar blue (yes, I do need that much storage =P )
Sound Card- not really sure on this one, any recommendations?
Heatsink- Again, any suggestions on a good heatsink would be much appreciated ^_^

I already have all of the optical drives and peripherals, although I'd like another super high res CRT to pair with my P1110

Debating on weather to get the Asus M4A79 or M4A79-T for my next build, DDR2 is dirt cheap right now, but with DDR3 supported by both the AM3 and i7 platforms it looks like that's the way to go right now.

I'm sticking with AMD and ATI over Intel and Nvidia because in the 6 years I've been building/messing with computers I've had nothing but good luck with AMD and ATI, the only AMD cpu I've managed to kill was my old K7 XP2000+ that ran OC'ed to 1.9Ghz for nearly 7 years before it gave up the ghost, and my old Radeon 7500GT 64mb AGP 4x card is still alive and kicking in my moms computer.

Just looking for opinions/suggestions right now, any advice I can get is a big help since I'm a lot more familiar with old tech ^^;