I am looking at the ferris is500, a toro titan and a z hustler. I have heard to stay away fron b&g motors. The ferris comes with that motor. The toro comes with the kohler engine but has integrated pump and motor for the driving wheels. I believe the hustler has a kawasaki engine and a zt 3100 pump system. Each of these mowers are about $5,000 so any input would be welcomed. I am not using for commercial use.