Thanks for the input Andy, appreciate it. I see what you mean. But I'm not building a downhill rig or anything like that at all. When you mentioned your budget included a bighit frame.
This is a simple XC set-up for the ordinary user, and the only expensive components are the suspension and brakes, which although are pricey, when included with a bike that is relatively old (2003-2006) but reliable, but price is around the £300 region.
Im not expecting XTR kit or carbon fibre, seems stupid to mention it, but I've built quite a few bikes before and found it works out cheaper to just buy a bike and modify it rather than faffing about with building it from scratch because of what you mentioned about the price escalating to £800+.
When I'm finished building the bike, I'll post up and show you what I mean with a budget bike built with decent components, none of that 'FALCON SHOCKWAVE SUPER ALL MOUNTAIN BIKE' crap which lasts one ride before the wheels are buckled and the suspension is shot.
Cheers!
Akif