Light(ish)weight Pompetamine

I also thought these might be possibles...Will keep looking for another couple of days, then pull the trigger on the best option and move onto the rest of the spec.

Bear in mind that UK landed price for anything from the USA is going to be about $1=£1, so that Traitor looks sweet but it's basically your whole budget gone on frame and fork.

As far as choosing goes, for this kind of bike I would always build from the tyres up, so pick the biggest tyre you're going to want to use and then eliminate every frame which won't work with it.