I think you should definitely eliminate the 2000 series for that much mowing. The 3000 series would be a better choice. Do a little more research on the small differences between the models.
I have a Champion and a Citation. I think you would be much happier in the long run with that much mowing to consider the Champion or ZT 4000. With their current 0% same as cash options the difference is not that great over 1 to 2 years. The power and ride is better and and IMO worth it in the long run.