I think your best bet would be go for a LT250, you can find them reasonably priced and you put lots of aftermarkets on. plus there super fast

 

keep it 4 stroke .

 

around here when a 01 raptor comes up their around $3500 , Ied also keep it 4 stroke , I have had a banshee and it was a pain in the a$$ to keep going and on trails it realy sucked , terrable suspention for the trails i was on