Okay, so this is what I decided, will this all fit in the case? And is the PSU good enough?
Samsung SH-S203B Black SATA DVD+RW
Coolermaster CAC-T05 Centurion 5 Aluminum ATX Tower Case
Seagate Barracuda 7200.10 320GB SATA2 3GB/S 7200RPM
Patriot Extreme Performance 2GB 2X1GB PC2-6400 DDR2 Dual...