I am a homeowner with 11 acres and want to purchase a hustler but am having trouble deciding on which options. Please advise I believe I want a 72" deck to cut down on mowing time. I currently use a woods 6ft. finish mower rear mount to a tractor. Which engine would give me the best results & most reliable. kohler 27hp kohler 28 efi (about $1,000 more in price, then kohler 27 is it worth it?) kaw 27hp L/C (also about $1,000 more in price over 27hp kohler) I dont want to under power the deck. Also would I see a benifit getting the super z over the regular z since I will only be using it on my yard and probably not be able to mow over about 8mph or so.