I blew up by 250w Enlight PSU a few months ago and got a 350 Powertec. My current hardware setup is:

Athlon 1700+ at 1.6Ghz currently
Floppy drive
CD-ROM
CD-RW
3 Case fans
GF2MX400 to be GF4TI
10/100 NIC
Firewire card
SB Live value
4 WD HDDs

The +5 on my mobo is about 4.87. Is my current PS powerful enough? Will a 400W Antec help my Overclocking situation? What would be the best PS to get?