RE: Need Ideas For X-mas Present
You should be able to pick up good deals on the "lower priced" model soon. Bowshops tend to stock alot of these lower end bows and when the next years come out, they have to dump them. Got my son a brand new Hoyt last winter, saved about $150 over what it was listed at 2 months earlier.
Get a bow that has several inches of draw adjustment that fits him when set at the shorter end, and if he truely is pulling 50 lbs already, get 50-60 lbs of draw weight. He'll be all set pretty much for life.