We have the model listed in my signature. It's a loft model with a large sofa/bed in back and a larger loft bed above, not bunk model, but works great for our kids and/or guests. It has 1.5 baths and a large slide out for that rear room. GVWR of the 5er is 12K, so don't let others tell you there aren't any models within your weight range; look around. Loaded pin weight at near 2K puts my truck right at or just over its GVWR, but well under the RAWR.
At 12K loaded our Duramax handles the 5er with no issues, either up or down the steep hills in California.
