7900gt or 7900gs??? Or 7950gt if i can find one?!

Soooo - yet more advice needed....

I'd prob buy a 7950gt if i could find one but i can't - live in uk - any idea where??? It needs to be PCI-E version - lots f the agp version around but no pci-e anywhere. The few vendors that stock em are all out of stock

Soooo that leaves me with 7900gt or gs.

I can see one or two 7900gt around but they're expensive compared to 7900gs. Plenty of 7900gs around. 7900gt at least £40-£50quid ($70-85) more than 7900gs. Is difference worth it???

that's basically as much as my psu can handle so i'm goin to get one of these cards n in a year or two build a completely new system.

If i do go for 7900gs there's a lot of choice out there - is any manufacturer particularly reliable/faster/quieter???

cheers for all the help - you guys are all legends