I have a question for those who have been at this for a few years. How do you know when it is time too move up in gear? Rite now i have yards that run in size from 1.2 acres up to 6.4 acres, that i mow with a JD727A 23 hp 54 inch deck, a scag 36 walk behind, and various 2 cycle equipment. The only draw back is that the 6.4 acres is a once a month yard with nothing on it. The reason why i ask is there is this other properity that i looked at that is 15 acres with 126 duplex units on it, and i know that it will take 2 ztrs to mow in with in a reasonable time.That is why i looked at a 757 today. Thanks have a good week end.