IMHO - in order of my experience
Mathews HTR - scary quiet with a 450 grain arrow, smooth, but slower FPS.
Mathews V3X - very quiet with the same arrow, still smooth, a little faster.
Mathews Phase 4 - same as above, maybe a slight bit quieter. Very smooth, fast, and dead in the hand over the first two.
The heavy arrow helps all of the above with less volume of sound.
YMMV
