Thanks John - alas too much technical stuff for me to take in, but the link is appreciated.
Probably not bad for a budget machine. You want the Intel Core i7 for Premiere, 16GB RAM is good, SSD good. Make sure you get a GeForce display card, I see some configurations do have the GTX 760 which would be fine for Premiere. One add-on that you might have to do yourself is to add a dedicated, fast storage drive for video. You could add an internal SATA drive such as 2TB SATA, 7200rpm, 64mb cache (WD Caviar Black or Seagate Barracuda come to mind). Avoid "green" drives which favor economy over performance. Or could use a fast USB 3.0 external instead. G-Tech has some nice units meant for video such as G-Drive or G-RAID for example.
Of course, you could always get a turn-key PC edit workstation system from an Adobe-approved system builder such as Safe Harbor, ADK or others ;-)
Safe Harbor Computers
Thank you Jeff.
I've taken a look at www.sharbor.com and ADK but I'm in the UK so I guess that's a no go. I guess I should have spotted the variant (and admittedly more straightforward!) spelling of Harbour... I would ideally like to commission from a friendly company I could actually talk to and who could offer advice so I'll take a look for a sharbor type service in the UK.
Sorry about the spelling...and I also drove on the wrong side of the road coming to work this morning ;-)