Rocker or two pedal is a personal preference. You'll find folks on both sides of the fence on that. I prefer 2 pedals, but that wouldn't sway me from buying a tractor with a rocker. I think you'll get used to which ever. And I think you can use a rocker like it's 2 pedals if you want.
As for the Kioti's. CK25/27/30/35 are identical tractors with different engines. That is the only difference. Identical tractors otherwise. If you plan to use the PTO a lot, I suggest the 35 HP. Always good to have as much hp as you can. I have the CK25 in shuttle. Great for ground engagement. I only use the PTO for a
chipper and post hole digger. Plenty of power for that. HST robs a few HP too. But, as was suggested 60" mowers are the way to go and that works best with more HP. drag, pull, push implements, you wouldn't notice a difference in any of them.
I have the industrial tires and hate them. Wish I had gotten AGs. The industrials are terrible in the mud and snow. Tough as can be and look good. But, if you want traction in the mud get Ags. If you care more about snow and lawn impact, get turfs. Load the tires and set the Ags as wide as they will go (they adjust to give you the widest stance). That's a really go price on the CK. I would wait too long on that one.