I have 4 acres of hilly, bumpy yard to cut. Mostly weeds and a little fescue, trying Bermuda on 1 acre soon. Currently I use a Deere GT225, 15 HP Kohler, 42" cut. It cuts fine but it takes about 3 hours to finish. I'm thinking about selling it and getting a Toro WB 52", 17 HP or the new Toro Time Saver Z, 52" 17HP. The Toro dealer suggests the Z over the WB because in his words: Cheaper, faster, ride instead of walk/velke, and since I'm only cutting my yard it should last just as long. I am really confused! I want a beautiful cut and I know the WB has a 18K+ blade tip speed - no info on the Z, I might need to pull a cart or aerator - Z could do that. Anyway - I figure I could get $2,200 or better for the Deere (2 years old and VERY clean- $3,550 new)and I'll just make up the difference. All my life I've wanted a nice lawn, I need something that will get me through mowing quick and let me work on the problem areas more. Oh yeah, I live out in the boonies - all yard work is done by me alone! Thanks for your help.