My 2015 EZGO Express has the Kawasaki drive train and I love it. I hardly ever drive my 99 TXT or my old sparky anymore. I really like the torque and
feel of the big single cylinder engine. It has a nice sound too if you want to open up the exhaust a bit.
All the brand new carts at the dealer are equipped with the Kawasaki engines so I am not sure about the "not making them anymore" statement.
I would make sure that you get a cart with a TEAM clutch setup as I have heard rumors of previous clutch issues on older carts. I talk to a lot of cart owners at motorcycle rallys and I haven't found anyone that has anything bad to say about them.