I'm looking for advice on a zero turn mower. We mow about 8-9 acres each week and my 13 year old Dixie Chopper, which has worked flawlessly for me up to now, is finally pooping out. I've been looking to replace it with either a lower end commerical unit or upper residential model, hoping to stay around $7k budget. I'm not in the lawncare business so speed and fuel capacity are not important, and although those fancy "air ride" seats look pretty neat, I'm not sure it's all that important to me. What's most important is durability and low maintenance. I need a mower that will withstand an occasional armadillo hole or rock that we seem to grow in this area of the country, and handle well on the slope edges along the driveway and pond. We live in a pretty rural area and our two local mower dealers carry Bad Boy, Ferris, and Hustler. Right now, I'm looking at a Bad Boy Maverick 54" with Kohler ZT740 engine and a Ferris 500s 52" with Briggs and Stratton cXi commercial 25hp engine. The Bad Boy definitely seems to be a heavier machine and costs about $1,000 more, but the Ferris has an excellent reputation and better warranty. My concern with the Ferris is the Briggs engine. I've always heard to stay away from them and opt for Kohler or Kawasaki, but the dealer assured me the new Briggs engines are built much better and require less maintenance than the others. Can anyone confirm this? Any experience or advice as to which brand would hold up best in my situation? Thanks.