PSU Advice required

[Geezer]

I need a PSU to run:

X1950 Pro 512MB
2.8GHz Dual Core (Pentium D 820)
2GB Ram
2 HDDs
2XDVD drives

Can anyone recommend something? I'm trying to keep the price down but hopefully get something good enough to last a while, even if I upgrade to Quad Core and a DX10 card early next year. Can I do this with £40-£50?

 

[Geezer]

That's really pushing my budget
Any opinions on the Huntkey 550W?

 

[Geezer]

1. Corsair vx450w - It's due on sale any time now and it has a single 33A 12v rail.

I've just looked up some reviews of this unit, it seems great so I think I'll wait for it
Thanks for all the replies