My 11 year old son rides an xr80r (2002) in hare scrambles here in nevada...lots of challenging trails, obstacles, hills, varying soils, etc. Instead of buying a completely new bike, might I suggest some simple, bolt on mods for the xr that will transform it into a fast, fun little bike? All the while still maintaining its tractability. My sons bike has been equipped with a Twin-Air filter, a BBR rev box, and an FMF powercore 4 exhuast. EVERYTHING took less than an hour to install, and completely transformed the bike. I would also suggest removing the snorkel from the top of the air box..it severely restricts air flow. You may need to up jet..although I didnt (but, i do live at 7000 feet). Dont be afraid of changing a jet..its remarkably simple. Gearing on the honda is also a place to experiment..i have the stock 14, plus 15 and 16 tooth front sprockets for my sons bike...beware..the 16 tooth gear lets it max out at over 55 mph!I think the modified xr is the best compromise. And you should see the pride on my sons face when he details the mods on his bike to his friends. Good luck.