If your happy with 28's, I would stick with that size.
I'm a dealer and have ran Ripsaws, Blackwaters, ect.
I had 28" Blackwater Evolutions on my '17 1000s and really liked them, although they wore very quickly.
I'm on the east coast (very rocky).
At the advise of my AMS Tire rep (Parts Unlimited), I decided to try the AMS M1 Evil in a 28".
These things are just what I was looking for!
They have an 1" deep tread (Terrabite's are 3/4), are pretty sticky and do mud way better than I would have expected. I beat the snot out of them and never had a flat. These things supposedly did the Baja 500 without a flat.
I sold the 1000s and bought an '18 XPT Dynamix - sold the original wheels and tires immediately.
I installed beadlocks and 30" Evils.
700 miles of PA Rocks, Royal Blue, ect and not one puncture. I have riding buddies that swear by the Carnivores, but they are riddled with plugs.
The 2 guys that I usually ride with both went with the Evils, and none of us have had a puncture.
-We all have Turbos and we drive like we are competing for a GNCC win!
Do yourself a favor and check 'em out.