The cost of switching cams, idlers, strings and cables would probably make such a conversion cost prohibitive for most folks. You also have to consider that limbs are specifically matched to the cams on any given bow. Switching cams, harnesses, etc... is almost definitely not going to yield the same draw weight range.

As for which bow.....I think the Liberty would probably be my suggestion though I was particularly impressed with the Justice that I was messing with a few weeks ago. Just to throw more fuel to the fire I am definitely going to be using the MM VFT as my hunting bow come this fall.