I wouldn't go with the Drop Zone.I would use a spring steel style rest if strictly 3-d is the purpose.Like the one Trophy Taker has or a Brite site Pro Tuner.I love the Pro Tuner.
There are some great sights.If you are wanting to stay in the pin class,take a look at the Extreme Snyper,Spot-Hogg,Hog it or some of the newer pin sights from Sure-Loc.
Arrows,hard to go against the trusted old ACC's with parabolic glue in points with 2" Flex Fletch vanes.Many will recommend fat shafts for line cutting but I never saw an increase in points with fat shafts but did see an increase with ACC's.

I did have a low energy setup and fat shaftsin outdoor conditions don't work well together.
Maybe looking into some good hand held releases might be a plus.Carter makes some excellent releases.I use a Fits Me Too,if you have small hands,this is a great release.If not,the Just B Cuzis awesome but I REALLY like the new Evolution.Back tension without rotation,AWESOME.
Just ones opinion.