re: Zero Turn Recs for Hills/Slopes

So I'm considering consigning my Bad Boy MZ Magnum because it seems to struggle at dealing with my backyard grass which is quite thick. I mow it weekly and it still has issues with trying to stall out in some spots and the deck doesn't seem to clear the grass very well. I have to jack it up and clean it out after every mow as it cakes up after just one cut. It handles my front lawn, the actual bermuda, just fine, and we do have a decently sloped area on one side of the house. I'm just wondering if an actual lawn tractor would do a better job on the rear grass, but am concerned if it will handle the slope okay without being a tip hazard. It seems from what I'm reading that they are actually more stable because of the weight distribution and the front tires. My Bad Boy has a 24hp Kawasaki engine, btw.

I was looking at the new Cub Cadet ZTR 2 Enduro GX54 D and also found a 2016 model Husler Flip-Up that is still new, 25hp Kohler engine, and reduced to $2,999. Any thoughts between these two or should I be looking elsewhere? Trying to keep it at $4,000 or less while being able to handle thick rear grass and still being able to manage the slopes is the goal here.