New build please help

Im picking out the parts for my first build i think i will be able to build it just fine but i cant decide what exactly i want to buy heres what i am thinking of buying

case
either
aerocool turbine 3t
http://www.newegg.com/Product/Prod [...] 6811196021
or
thermaltake Kandalf
http://www.newegg.com/Product/Prod [...] 6811133152

power supply
cooler master 600 w
already have this and i have used it to power up my dell and everything was fine (i think thats good)

http://www.newegg.com/Product/Prod [...] 6817171008

ram
patriot 2x 1 gig ddr2 667
http://www.newegg.com/Product/Prod [...] 6820220095

Gpu
pny nvidia 7900
http://www.newegg.com/Product/Prod [...] 6814133166

oversided heatsink

aerocool dp-102 http://svc.com/dp102le115-17.html

I am waiting for the conroe's to be released and the price battle between amd and intel (i wish) to pick a motherboard and Cpu but i was leaning toward the presler 940 and the ecs pf22 i know the pf22 will not be compatible with the conroes but if its marked down i will take it . I dont have a pref between amd or intel. i just want what offers the best value.

if any one owns any of these parts and wants to let me know how they like them i would appreciate it also i am open to suggestions of any kind. Also if any one has the kandalf i would really like to know how you like it and if its worth the price and if its worth adding the side panel

http://www.newegg.com/Product/Prod [...] 6811999812

Oops forgot hard drive and optical drives

Seagate Barracuda 320gb 7200 rpm 16mb cache
http://www.newegg.com/Product/Prod [...] 6822148140

sony dvd+RWDL
http://www.newegg.com/Product/Prod [...] 6827131031

I was thinking about buying two other small hard drives too (around 10gb) and load linux on one and widows on the other so if and operating system gets corrupted i dont loose my data. Is that a good idea? what version of linux should i use?