Guys,
I just returned a pair of Alpinestars Durban Gore-Tex boots to NewEnough (now called MotorcycleGear.com), but wanted to give my opinion. I ordered the boots because I have a pair of Alpinestars Motorcross boots (Tech 2's) and was impressed by them. The Durban Gore-tex boot is definitely heavy duty, and has 3 buckles for good adjustability to your foot. The Gore-tex liner does not come all the way up inside the boot, but maybe 2/3rds of the way up. It's a stiff boot, but has excellent ankle/heal protection. Overall, I think it's a well design, sturdy, waterproof boot.
The reason I returned the boots was that I had foot surgery and had my big toe fused. The boots open up pretty well, but not enough for me to get my foot into the boot without alot of effort (and pain at this point). Anyway, if you're looking for a completely waterproof boot (and breathable) with good adjustabillity, this might be the one to try.
Bob