Just went through the boot choice process myself, ended up with klim adrenaline boa. I looked at a bunch of the dual sport / enduro type boots and the problem with all the ones except the Alpinestars is they lack protection compared to an MX boot. Alpinestars toucan is nice but at $499 is a bit steep for my taste. Formas were another one that looked okay, but I could touch the outside of the boot and feel it on my foot. Those couple of thin spots could get cold and I can not see it as good protection.
When I got the klim, there was a klim rep at the dealer and he told me that the boot has a flat bar in the soul for reinforcement and walking around on them seems to confirm that. The boot has two major pluses for it it is warm and waterproof, as far as protection to me it seems better then some dual sport models I look at. A few riders I know use them and had no complaints. I did not use mine yet this year but they look like solid choice.
Last year I use FXR boot and it leaked after a couple of rides. There is a new boot made by FLY racing that looks like it may have came out same factory as the FXR, I would not recommend it.
For shifting on my Husky I set the shifter up a couple of splines and had no problems, you do have to move your foot a little more than in a MX boot but you get used to it. For the shifter I would recommend a piece of rubber hose over the end so it does not wear the boot.