I went boot shopping today and was lookin to buy a pair of HMK's. I ended up comin home with the new Klim adrenaline gtx. I used to wear snowboard boots and loved em, so I was lookin at the HMK's and Klim Radium for the same kind of stiffness and style.
The Radium was nice and stiff, averagly comfortable, but pretty bulky and huge.
The HMK was comfortable, not too large, and having NO laces was nice! I was convinced.
Then I tried the new Adrenaline; as soon as i laced them up, I was sold. They are Very comfortable, but still stiff enough to give ankle support. They are a nice sized boot, and not bulky.
I think you have to try a few different boots on and see how you like them. I think in the end all three boots I tried on would perform similar and be just as warm and dry, but I went with the most comfortable ones that still had a lot of support.