I have the Ferris 48 comfort controll DD ... better operation than hustler and even the Hydrocut.
Go with the 36 comfort controll DD..
The comfort controll dd has really good handling, and cuts and discharges the clippings very well.. Personally its stronger than the other machines. Standers dont have great traction on hills and slide around in wet weather. with the double hydro.. you'll be impressed with the ferris.