I'm a groomer and I'm looking into getting a dryer just to have at home for my own dogs. We have a k9 II at the shop and I love it. Works great, very powerful, blasts out the undercoat on thick dogs, and is pretty fast to get them dry. The downside is that is is incredibly (almost painfully) loud. I've heard that the cool dry is very quiet, but not as powerful. Has anyone had any experience with both dryers? How much less powerful is the cool dry? Will it still be able to blast out undercoat on thick dogs? Does it take a painfully long time to get them dry as compared to a K9? Basically I'm wondering is the quiet of a cool dry worth the lesser power? Or am I better off sticking with a k9? Thanks in advance for your help!