Theres a few serious BMX riders on here if i remember right. I've only really used mountain bikes and even still its been a couple years since i was into it. How much should i be looking to spend for a pretty good one? any specific newer bikes worth buying.

Wanted to spend £150-200 but would pay more for a proper one...

Been looking a these so far? any good?

http://www.ashcycles.com/power/index...roducts_id=625



http://www.ashcycles.com/power/index...roducts_id=273



http://www.ashcycles.com/power/index...roducts_id=274