Hey guys..I am looking into a second mower for this spring for the start of my second year in business. I have been told that the Z style (either toro, exmark, or scag) mowers are the best out there because they can get the job done the fastest. However, I have a scag 3 wheel rider now and i love it...it does everything i ask it do and its about 15 yrs old. Anyway...Here are a few questions...Are the Z style mowers really any faster? What advantages to the 3wheelers have over the Z's and visa versa? What are their disadvantages. Just for more info, I have about 20 lawns, hoping to get to about 40 this year, and most are between 1/3 and 3 acres in hilly landscape. Any and all opinions would be appreciated.Thanks.