Motherboard: Looks good, It should overclock just fine...
Memory: Newegg.com - OCZ Reaper HPC 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 1200 (PC2 9600) Dual Channel Kit Desktop Memory - Desktop Memory is what i would get, The reaper heatspeader design is very nice.... The other set you linked to is more designed for water cooling setups...
Heatsink: I would go with the first one, I dont really think you can go wrong with heatsinks but its probably the best of those four...
Optical, Memory Reader, & Hard Drive: Look good...


Quote Originally Posted by K_Dog View Post
The oem Win xp is licensed to the hardware you built the computer with. The retail can be moved to a new computer provided you uninstall it from the first one and only use it on one computer at a time. other than that there is no difference.

The Zalman 9500 and 9700 are top performers on Max pc cooler tests.

The mobo you selected looks like it comes with Sata cables for the drives.

good luck have fun