For lazy people like me please include what the things are, its much easier if you just list the components and then provide a link for more information. Sure it takes more time but you did ask for our thoughts. I almost didn't even read this post after seeing links with no discriptions.
I've done it for you this time only because I don't have much else to do right now:
LG Black 52X CD-R 32X CD-RW 52X CD-ROM 2MB Cache E-IDE / ATAPI CD Burner - OEM $17.99
Rosewill R6426-P BK ATX Mid Tower Computer Case - Retail $20.99
Western Digital Caviar SE WD800JD 80GB 7200 RPM 8MB Cache SATA 3.0Gb/s Hard Drive - OEM $41.99
Foxconn 6150BK8MC-KRSHN2 Socket 939 NVIDIA GeForce 6150B(PV) GPU Micro ATX AMD Motherboard - Retail $59.99
LOGISYS Computer PS550ABK ATX12V 550Watts Power Supply With SATA and 20/24 Pin connectors. 100 - 240 V $19.99
RetailCORSAIR ValueSelect 1GB 184-Pin DDR SDRAM DDR 400 (PC 3200) Desktop Memory - Retail $54.99
AMD Athlon 64 3400+ Venice 2.2GHz 512KB L2 Cache Socket 939 Processor - OEM $40
COOLER MASTER DK8-8ID2A-0L-GP 80mm Rifle CPU Cooler - Retail $4.99
Total: About $256
This is a bit more expensive, but might be a better framework to work off of, I built one of these last week:
Seagate Barracuda 7200.10 (Perpendicular Recording) ST3250620AS 250GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM $69.99
AMD Athlon 64 X2 3600+ Brisbane 1.9GHz Socket AM2 Processor Model ADO3600DDBOX - Retail $69
CORSAIR ValueSelect 1GB 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300) Desktop Memory Model VS1GB667D2 - Retail $31.99
ASUS M2A-VM Socket AM2 AMD 690G Micro ATX AMD Motherboard - Retail $68.99
COOLER MASTER eXtreme Power RS-430-PMSR/P 430W Power Supply - Retail $29.99
COOLER MASTER Elite 330 RC-330-KKN1-GP Black SECC ATX Mid Tower Computer Case - Retail $39.99
LG 18X DVD±R Lightscribe DVD Burner Black IDE Model GSA-H44LK - OEM $31.99
Thats $340, but you could use your case to save about $20. Use your cd drive and save another $14, use your hard drive and save about $30 dropping it to $276 or $266 if you get that power supply you picked. So I think for a few bucks more you get a lot better computer. You are really limiting yourself by going socket 939, the one I picked is slower Mhz but its dual core vs single core. The power supply you picked does look pretty bad, for $10 more I got one that is probably better, but again not something I'd want in a more high end system.
Just something to consider.