Brakes first!! But they did that for 03+!! Then I would widen a bit and lengthen a bit, maybe gusset frame from factory. Better suspension is implied. If it weren't for the emissions, they could have made some minor adjustments to the blaster and sold it in the same price range, and it would have been way better than the original stock blasters....not even touching the motor.
I would make the blaster a 4x4 quad before I put electric start and reverse on it. It's a sport quad....those things just aren't necessary, IMO!!