I had a biscuit. Got a QAD Ultra rest drop away and I won't go back to the biscuit. No more warped vanes and tighter groups. Plus I can shoot flu flu's now too! When you install your QAD may I suggest that you don't use the little plastic "football" looking clamp that comes with it and just slip your cord through your string and service it in. Use a lighter and melt a little knob so that it won't pull back through the string. Take it in to your local bow shop and have the Pro do this for you, and make sure that it's setup to drop at the right time and all. The reason for this is that it will never slip and with the plastic piece with the two small screws there is a chance that the tip of the screw could cut at your string over time or even all at once even. While your there have him check out your whole setup, knock height, kisser button, peep site, string-arrow-site alignment, draw length, both cams in timing, etc. My local shop charged me about $8.00 for all this, no charge for the chit chat. That guy is a wealth of good information for sure.
As far as the stabilizer, yea go ahead and get one sure can't hurt.
This will give you confidence that your rig is right. Then just practice, practice, practice.