Scott,
I've used them all and yes the single mount does vibrate some. You can even see this in the old Bear Archery videos when Fred was in Africa during the late 50's. The double spring arm is the quickest to get off and on, but be careful the length matches the bow you put it on. The arms aren't adjustable, but the quiver did come is a short and long version. I found the tape-on model to be the most versatile and the most rigid. The only drawback is it takes a little time and tape to install. As far as balance, this never was a very important issue to me because just about any quiver makes a bow shoot different. If you can get hold of a copy of the CD of the Grayling Bear catalogs (Three Rivers Archery) you can see all the quivers described. Good Luck.
roofleakfixer