Have owned Danner Proghorn and have been my favourite boot, BUT -
When I first got them 10 yrs ago I thought they were the most comfortable boot I've owned and I still do.
The waterproofing / gortex lasted about ONE year. And I live in a very wet climate.
Other than that, great boot. While comfortable, they are not real "stiff" like some backpacking shoes. (like vasque)
I still wear them and I enjoy them but the waterproofing not lasting was a bummer.
Now I just apply both mink oil and that spray stuff to cause beading. Waterproofing last for one or two hunts then I need to reapply.
If I were looking at a new boot the biggest question I would consider (based on my needs) is how waterproof do you need them to be.
Not the best boot for backpacking as they are very pliable. Thou an 8 inch upper (or whatever it's called) I have still rolled on my ankle when hiking rocky terrain.
I have been dong a lot of reading on boots recently and it seems on the majority of backpacking sites that many peeps are sharing that gortex gives out after a few seasons (event when maintained properly.
For that reason, while not as comfortable, a full grain boot like this has proved (for me) to be better on the long term waterproofing...
http://www.vasque.com/vasque-shoe/7142-vasque/7142-vasque-mens-sundowner-gtx-burgundy Good luck.