build it myself and save 500 euro or so.
Plus there's so little point with these over-specced pc's, once you hit a solitary hd5870/gtx480 there's little extra gains to be had if any, there's no game that'll tax you even at 2560x1200 (well, apart from maybe crysis 1). What'll be best is to build a computer yourself when the hd6870 hits in a month or so
Don't worry if you've never built one before, it really is very simple/