I am looking to buy a ZRT, and I really like the Kubota's.The new deck they came out with is great. It's a tough machine and it can climb hills.Also it has an AWESOME Diesel engine. I am most likely going to buy a Kubota.What do you guys think about them? Which ZD should I get. The 21hp or the 28hp. I have a steep slope but the 21 still should climb it? Which ZD should I get. I'm starting a little landscaping buisness.