I currently own two Ross bows. The CR331 which is the one you saw and the Cardiac. Ive shot bowtech before I bought my Ross's. Like mentioned before they are super smooth, great shooting and very quiet bows. They use to offer four models. The CR331, CR334, CR337 and the Cardiac. For this year they are offering the Cardiac in a 31" axle to axle model, a 33" and a 37". Suprisingly the Cardiac is smoother and more shock free than the CR line they had. Someone mentioned before that they couldnt get the advertised 320 out of a Cardiac. Mine is set at 72lbs with a 29" draw shooting a 375 grain arrow at 300fps. Thats with string loop, peep and string silencers. I you do the math its right at 320 IBO.