I have an old one and a new one. And here is my opinion on the two machines. My next gen has a 25 kohler with 60 in ultra cut series 6 on it. My old lazer z has a 27 kohler with a 66 inch triton. The next gen will out mow the 66 without any problem. Even though the deck is smaller it is just so much quicker and has way better traction. Now dont get me wrong the 66 is one heck of a mower but the next gen is a better built mower. Now i know that there are many exmark haters on this site and everyone is obviously open to their own opinion but for my situations the exmark is the best built mower for me.