We settled on a Montana as well BUT there are so many different brands and models, it's really hard to "nail" down a "best".
I would talk to people in campgrounds or at RV shows to see (in person) what they liked and what they didn't like about their choice. Most people experience some sort of "glitch" with their units at some point in time, some "glitches" are bigger than others but if you were to poll people on here I'd bet most have had a problem of some kind. We have with ours, thankfully it's not been anything major, just a couple of little things.
Just because you buy a "high end" RV north of 100k doesn't mean it's going to be trouble free. Taking good care of what you own is more important than what brand or how much you laid out for your RV.
Just my two cents.
Dan