Almost ready for build.. need case/PSU advice!

So far I've bought these:

ASUS Striker Extreme LGA 775 NVIDIA nForce 680i SLI ATX The Ultimate Gaming Motherboard - Retail
http://www.newegg.com/Product/Prod [...] 6813131074

EVGA 768-P2-N837-AR GeForce 8800GTX 768MB 384-bit GDDR3 PCI Express x16 KO HDCP Video Card - Retail
http://www.newegg.com/Product/Prod [...] 6814130078

Crucial Ballistix 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 1000 (PC2 8000) Dual Channel Kit Desktop Memory - Retail
http://www.newegg.com/Product/Prod [...] 6820146563

Intel Core 2 Duo E6600 Conroe 2.4GHz 4M shared L2 Cache LGA 775 Processor - Retail
http://www.newegg.com/Product/Prod [...] 6819115003

I plan on RAIDing two decent drives I've got lying around until I can find a deal on another Raptor to throw in a RAID0. I've also thought about getting a CPU cooler, but I'd like to make sure I have room before buying one (Tuniq Tower 120, more specifically).

I'm very close to buying a LIAN LI PC-201B ( http://www.newegg.com/product/prod [...] 6811112109 ) for my case, but the only thing that worries me is that I'll need some long cables and the CPU cooler may not fit. If anyone has experience with this case, please let me know!

I have a spare 500W PSU at home that's probably a POS, but I'm worried about its quality and whether or not it could keep up with my system--especially if I add a wealth of hard drives. I'd like modular cable support, but its not essential. I'd also want to make sure that all the cables are long enough to use in the Lian Li case. The graphics card seems like it would be pretty far away.

So, most the advice I'd like is on the PSU, though I'm welcome to any other thoughts. What wattage should I go for and which PSU can I count on for being reliable?