I believe that Art P has summed it up quite well. Pay it now, or pay it later.

Regardless of manufacturer claims or the claim made by a shooter sponsored by a manufacturer, when it comes to bows there is always a price to pay for increased energy and stored energy. As Art has said, (paraphrased) let-off is not draw-weight. You still have to pull the bow through the draw-weight. Many of today' s hard-cam bows are joint killers. They hurt me and my shoulders are fine.

A 39" + ATA " wheel" bow, or the " ultra-sonic wheel " like the one produced by Martin, pulls smooth through the entire draw range and do not jerk your socks off on let-down. Based on personal experience, either design will do the job and do it quite well.