I ahve no set budget.. hence the long explanation of what I need.. Whatever the spec that i require to run photoshop and the like as good as possible..then thats the budget i need.. if theers a choice then cheapest
I built a system a little while back, this was the thread I posted at the time, parts listed:
http://www.talkphotography.co.uk/forums/showthread.php?t=124424
Since then I have added another HD which is a back up drive for the Raid 5 which it is using, a 1.5 TB WD drive. Another item I have added, a 4 GB SanDisk USB stick for ready boost, it has not made a huge difference to the speed of the computer as the Windows Experience index is at the max of 5.9 across the board, but what it has done is all but stopped any hard faults in the memory / page file access, this can slow the system down a little as the info has to be pulled from a HD instead of the RAM.
Now the important part, Photoshop is almost instant in opening, it takes about 1-2 seconds from point of clicking the icon to open Photoshop which is ready to use.
Bridge brings up thumbnails in the viewer (light table) in next to no time and when working on photos there is no waiting for any filters to be applied, I used to always find when working on, "for instance", a mono image and I wanted to dodge and burn a photo I would always have an egg timer when working on large photo, not any more, to say I am ecstatic would be an understatement!
As for the OS, well I have to say with the release of the SP2 for vista it is as good as XP IMHO. very stable and fast!
The other benefit of this home built PC, I can now sit next to the "box" and there is only the lightest of hums as it is so quite compared to the old pc which sounded like a jet running up, while the new one sounds like a hover fly!