I would like to add something into this conversation with out trying to sound too judgemental. There are very good suggestions so far. Pretty much everything I would have said, but if you are serious about speed then you shgould not even consider a smooth drawing bow such as anything with an MPro cam. The cam is not designed for speed.
If you want speed then you buy a speed bow and get it over with. It's a whole lot easier to slow a bow down 20fps than it is to fight to get every last fps out of it. And in the process you often end up with a setup that is a little more forgiving and not so finnicky if you make the least little mistake.
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver