If I can get the 52" w/20HP Kohler for just a couple hundred more, is it worth it for the following reasons: 1) resale value (if ever need to sell) 2) faster speed (9.5 vs. 8.1 for 48" 21HP Kawa) 3) easier maintenance - the 52" unit has the quick-drain oil chg system spout. the 48" just has a plug that looks tough to get to and would make a mess. I really don't need the 52" deck since this is just for my own home, but I would get a faster unit that is easier to change the oil. Plus, I assume resale would be better/easier. Just not sure if the 20HP Kohler is enough HP for this size deck. I thought I read the Kohlers don't have enough torque like the Kawasaki's do. Any recommendations?