After doing research I'm still confused and maybe someone can help. I am closing on an eastern KS property near KC that contains 4-5 acres of fairly level grass mowing. The property comes with a JD 757 with 400 hrs. and I think that is about a 54" deck? My question is, while I like mowing I'm wondering about trading in the 757 for a newer model possibly commercial grade that will cut down the mowing time. Owner says they mow the area in about 4-5 hrs. After reading the JD website I'm still confused as to what I would move up to from the 757. I think I want a 60-65" deck. This is south KC area and there are other dealers besides JD but I may want to trade up with a JD dealer?? Can you suggest what models I would be looking at to move up from a 757 model and cut my mowing time? I'm interested in quality, seat comfort and time efficiency. Thanks.