This is my third year in lawncare and am starting to get bigger. I mostly do residential but i am going to be doing a big commercial lawn this year. Right now i am only using a 42' deck size and a 21' push. I wanted to get an exmark because i have heard nothing but good things about them and was lucky enough to drive one and loved it. I have about 6 residential lawns ranging from 1 hour to 3 hours with a 42. What would u recommend upgrading to???All your help would be great. It has to be under 10 grand. Thanks again!P.S. If i did this commercial lawn with a 42 it would take a good 6 hours!