Welcome to the MOC Forum! I selected my model (3500RL), because I'm single and like the feel of a small condo and it offers separation of the den with sliding doors from the kitchen and of course the bedroom closes off also, so I have a three room mini-condo on wheels
It works for me as one large open space would drive me crazy. However, if I had a significant other I may have selected a different unit. Pick the one that will fit your lifestyle and desires. The Montana has many floorplans to suit everyone. Again, welcome to forum...and good luck to you! Allison