Hi, like the title says im looking to buy a bmx, it will be used to do trails and street stuff, im quite tall so will need for it not to make my back ache like alot do I would like a cassette hub but is not important, and just to come with the back brake like the wethepeoples ( i think they are ) im looking to spend about 300 really.. maybe less, maybe a tad more.. cheers all!