Hello

I am currently have a amd athlon 2800 & 400w psu, But i new computer is

AMD 64 AM2 3800+
MSI K9N- NEO
Geforce 6200 le Graphics Card PCI Express
3 x 512mb of DDR2 Hynix Memory
250gig Western Digital sata drive
Nec DVD writer - due to be replaced
Sony CD Rom Drive
Floppy
External 120 gig Usb2 hard drive
BT Total Broadband

Any ideas on what psu i need i was looking at a 600w on ebay but the manual for mobo said 350w is plenty?? ???