Oh no Lee, you've just hit the nail on the head, I'm EXACTLY the sort to build it myself! I guess I've been, metaphorically speaking, sticking my fingers in my ears going "la la la la"! I'm going to have to look into this now.
Seriously though Lee, thanks for the info, much appreciated. I can't ignore getting a better spec machine for less money, and the enjoyment of a build thrown in.