I'm usually posting over in the roadie section here but my 13 year old is wanting to purchase a new bmx bike and came to me for some guidance. Problem is, I know absolutely nothing about them so now I turn to you guys here. For starters, he is a rather tall and lanky kid who is right at 6ft 2in tall already and has been riding his wal mart bmx (according to him) comfortably for the last 3 years or so he's had it. He has also expressed the desire to have a chrome moly frame, three piece crank, and larger than usual handlebars? I guess my biggest concern is frame size at this point, should I be looking at 20, 20.5, 21, etc... Logic tells me to bump him up to a frame with 24in wheels but he resists that thought because at that point its just a cruiser?

Anyway, sorry for the newbie questions here but he's on a mission and I hope to have some insight as to what to look for. I'd also like to get some recommendations as to where to get a deal on maybe some leftover stock or closeouts on a decent entry level bike. Thanks!