I was recently in the market for a new bow and although i' ve never shot the AR31 or 37 i did shoot the AR34. It was a breeze to draw set at 64lbs and was pretty fast and quiet however there was a little more handshock and vibration coming from it than i cared for. That was a bare bow so we put a set of limbsavers on it and shot it some more and although it did take a lot of the handshock out there was still some there. I' m not saying that the AR series isn' t a top notch bow because i' m sure it is it just wasn' t the one for me. I know several guys who shoot them and couldn' t be more happier.