I will cut to the chase and sum it up like this: If your done playing around and wasting your time with lawn tractors then it is time to buy a John Deere Zero Turn mower. This machine is designed to mow grass, it does not play, therefore you will have a lot more time to do other things. I mow 4 acres in 2 hours, no joke.
Don't tell a John Deere rep, but knowing what I know now I would have paid more for mine. I've owned this 4 acres for 32 years so I have tried a lot of different equipment. Needless to say the search is over.