Hi mrrocko,
Welcome to the Heartland Owners Forum and hopefully to the family. We have a great bunch of people here with lots of information and all willing to share their knowledge when needed.
Your are correct,, it's a personal thing. I think your comparing the Bighorn 3670RL to the 3582. The 3670RL has proven to be one of the best sellers of the Bighorn line. We have wanted one for several years and have found a clean used one we are in the process of trading for right now. I think your wife will like the kitchen area better as it looks like it has more counter space. I also do not see the need of two sinks in the bath and bedroom like the Montana has,,, wasted space I think.
But here again.. it's a personal thing. Ask your questions and our family of owners will help all they can. There is also a Heartland rally in Montgomery near you April 5 weekend. Go over and visit with some Heartlanders and get some first hand information.
And Yes,,, the Bighorn is built for full timing.
Enjoy the forum and keep us informed.
Jim M