My 64" classic whip h.s. is the finest, best-mannered bow I have ever shot, smooth-drawing, dead stable, fast and like all Dan's bows, QUIET. For all that, I shoot my Super Ds about 95% of the time. Though very quick for a D shaped bow, they are not quite as fast as a Whip and have a very slight pulse at the shot but they are every bit as quiet as a Whip if not even more so. I am awaiting delivery of another Super D as this is written. Good luck choosing between the two and you can't make a wrong decision really.