If you're going to be using it to haul another vehicle very often you may want to look into some airbags for the rear suspension. Also, Mike, the MC vehicle NEEDS airbags with that kind of load in the bed!!
If more power is the goal, I can attest that the TRD supercharger for the V8 kicks ass. Roasts tires all the way thru 2nd if you brake torque it enough...not that I've ever done that...
Ryan