I may be able to squeeze in the BFG.
Have heard that it may not be actually 550W though...
NCIX FORUMS - Which is better quality BFGR650WPSU or B... - BFG GS-550 550W Power Supply ATX V2.2 EP...
With that and a CM Elite RC-330 case it comes to $98.72 after shipping and taxes (if PM is accepted).
The other way I was thinking of going was with the OCZ 400W and a cheap $22.00 case.
That will end up being a good $30 cheaper...
I don't mind spending a little more if I have to, but it is supposed to be a low-budget build and I knew I'd be getting low-budget parts.