Looks good, I just went totally over the top
HP Workstation* xw6600 PW459ET
Intel Core Quad processor, has room for a second one.
2G memory, 250G disk.
10% off for registering on their site, £100 off for buying this month.

We use Dell dual core at work, and they're fine for photo editing.
Also I got a 24" widescreen Dell monitor, and it's almost perfect out of the box.
Calibration with an i1 display was almost spot on, just little kinks in the curve.
But that's with XP.

I don't like Vista, but it works at work
For the one victim that has it today, there's only one thing that doesn't work.

With the HP I bought I get a downgrade to XP because it's a business computer !