I am about to buy a 48 (might be a 54, looks bigger than a 48 to me) inch mower. It is NOT floating deck, but it is dual hydro with a 20 hp Kohler engine!? Never seen a walk behind with that much, ususally have 17 Kaw. First of all, is it worth getting a mower this big w/out a floating deck. Its a great deal, and a fairly new mower (no more than 5 years old I'd say). Do y'all prefer Kaw. or Kohler? And whos the best? I know there are some other brands like Robin etc. Also, is there a mulch kit for it and where could I get it and around how much? Thanks!