Well, mine is setup for 3D too. A lot of people like drop-aways, but I can see some inconsistancy problems with the Nitrous-X systems. I personally, would probably go with a GKF style of prong rest, like the Infiniti. You might want to look at the TM Hunter with AutoLoc. I am not real kean on Whisker Buscuits. IMO, anything with that much contact, can't be good or easy to tune.
Sight, I would probably be a Spot-Hogg Hogg-IT. I haven't seen the Sword, but if it doesn't have the micro adjustments of the SH, I wouldn't have it.
I have a STS on mine. It helps a little. The bow is not that loud. I would just order a single and the rear mount will work fine.
I would put BowjaX's on all the strings and cables, although again it is probably quite enough.