I have had Nitro, Burton, Salomon, Ride, and Northwave boots. Like MelC said, boots are a very personal fit.
So for what it's worth, my Northwaves felt great at first but packed out a lot and fairly quickly.
The Nitros were INCREDIBLY narrow in the heel. I have very narrow heels so that was fine for me, but they probably would have been painful for most people.
The Burtons I bought for $290 didn't do it for me. I wore them approx. 9 times and disliked them so much I sold them for $60 just to be rid of them.
The Ride Cadence was a nice boot, but an articulated piece in the calf broke so there is no support left in the calf area. And BOA is one of those things…I had a pressure point from it, but a lot of people really like BOA. It was certainly easy to get in and out of my boots and make quick adjustments.
The Salomon Kianas have been pretty good. They feel pretty true to size and though they started off very stiff, they loosened up after a bit (not loosened like lots of packing out, just broken in). I have had trouble with the speed lacing on mine, but they are last year's and I think they have tweaked the system. The laces pop undone sometimes when I am riding along. Even given the issue with lacing, I would look at Salomon again. They are the best boots I have had so far.