My wife and I were also looking at the 3750FL. Like you we love the front living floor plan. However, I think we've decided on the Montana Mountaineer 375flf. (Haven't bought it yet) It's the exact same floor plan as the 3750FL, but it's lighter and only has one door. One other feature that we found out about is that if the sides are closed on the 3750FL, you can't get to the bathroom except through the second door, and you can't get to the bedroom. So if you're pulled into that Walmart for the night and can't open the slides, you can't use the bed. Plus the frig in the 375flf is in the slidout which actually gives you more room in the dining room/kitchen area. Just my opinion though.
Edit: Oops, I thought the 3850 was a typo. I didn't realize that Montana had out a new 3850FL. Disregard above. Sorry