UPDATE, 3.5 years later
I consider myself fortunate to have purchased a GT48DXLS when they were available. I changed out the rear tires for ags and installed the mulching plug. It is a BEAST! With the new tires, it will mow up hills steep enough to raise the front end off the ground. The locker is superb, and it's great to be able to easily turn that on and off. I'm a XXL guy, 6'3", 275lb. It hauls me up the mountain with authority. The Kawasaki is perfect. When the ground is dry, I have to blow out the air filter every couple of hours - it's doing it's job. The wife loves driving it. We run Oregon Gator G5 blades, which are much more durable. The mower deck has taken a beating from rocks and trees, and has held up fine. We have enough rough stuff to knock the deck off the front hanger once or twice a year, but it's an easy fix in the field, no tools required. We're still running the original belt.
We pull a drag harrow with it on the back lawn area. For the native areas, I use a Rhino. I don't snow blow, I haven't added a bucket, and I don't tow a trailer with it. I have a Rhino and a CUT, but they don't mow up and down the mountain nearly as well as this mower does. It's been an outstanding tool for the job.