hmmm well i bought a two hip last summer and within a month i had bent the forks snapped the chain broke the seat and tore the grips to shreds dented the fuck out of the frame... so my advice would be dont buy two hip
it really depends how much you want to spend i would recommend a fit bmx which start at around 600 or maybe a specialized fuze you can find more info about this if u go to www.pinkbike.com and look at the forums hope this helps