I think you should ask yourself if you want to be "competitive" at 3-D, or if ya just want to shoot 3-D for fun.
If you want to be competive, use every means available that's allowed for your setup(class). For some this means powered scopes, long stabilizers, high-end rests, high-end releases, and good carbon or ultra-light aluminum arrows. If this is the route you want to go, let me know-I'll tell ya what most of the better shooters are shooting.
On the other hand, if you are just looking to shoot for fun, just about any setup will work. I shoot a seperate bow for 3-D, and then switch about a month ahead of the season to my hunting rig.
I see you're from Perrysburg. There are a lot of shoots in the area. Just go to Gander or Clelands to pick up a shedule.