I was shooting a Mathews z-max before, and lets just say its night and day, super quiet, smooth drawing, zero recoil, I couldn't believe the difference. As for speed I really didn't give much up, same arrows I went from 299 to 292. The way I see it, quieter smoother, tighter groups easier to draw. As much as I love my z-max, I doubt I will ever shoot it again..
I think the only thing that I am going to change is, I am going to take Mathews overdraw off and put on a drop away rest.. There just seem to be too many benifits to a drop away..
Matt