I have an old Encore Z 42 which is long overdue to replace. I have about 2.5 acres to mow but the terrain is hilly and not very smooth so I'm looking for a rugged and durable machine. I'd like to stay under $5500 but I'm a little flexible in price if there is a big jump in quality for a little bit more. So far I'm considering a Gravely ZT HD, a John Deere Z445 and a Hustler Fas Trak or Fas Trak Super Duty. I think the entry level Ferris, Kubota and Scag are about at my upper price point but I don't know too much about them. Anybody have other suggestions? The JD has a stamped deck; is that a big minus? Anyone familiar with the quality of cut between these machines? From what I've read Kawasaki make about the best engines for this sized mower, any opinion on that?