If you have never set up a drop away before, I would recommend you let an archery tech do the job for you. You can easily screw up even the most basic of them to install if you don't know what to look for.

My personal preference is the QAD Ultra HD. Full containment, whisper quiet. A lot of the choice will also depend on the type of bow you shoot. Bowtechs have a sharp increase of poundage right before rolling over into the valley.. so having a full containment or other deep fork style rest could well keep you from flinging your arrow off your launcher arm (and no matter how smooth you draw.... it will happen sooner or later.

Mathews new drop away rest is a really simple and really good drop away. Another rest that works exceptionally well on mathews bows and other single cams is the Schaffer rest.