Bikes: Canyon Stitched 360 Specialized p3 Ns movement
Frames: Blackmarket Mob, malice Ns suburban
Better yet get the 26player if that's what he really wants. A lot of choices out there but those I really like as a complete bike. Good looks too.
You could also get a frame only and look for good deals at bmx shops if your son is in to cromo frames. You may end up saving a lot but also have a very decent build.