my son wants a bmx for his birthday he will be 10 and i want to get him something half decent for a couple hundred quid he wants to learn tricks and wants one with the swivel headset thingy any ideas on what to look for and any good place to mail order ive been to a shop today and seen for £220 a mat hoffman(spelling) with trick nuts and the swivel thingy but i know nothing about them so advice please peeps in my day it was a raliegh burner with solid metal trick nuts