I have a large yard that I maintain, which includes mowing about 3 1/2 acers of grass. The back yard has a decent slope to it and is fairly rough. Most people would consider it a field, rather than a lawn. (see attached pic) I currently have a Cub Cadet 2185 with a 48" deck and it takes about 3 hours to cut the yard. Every time I cut, I'm constantly thinking that there has to be a better way. I'm almost convinced that a "commercial grade" mower designed to cut large amounts of grass would be a better choice then buying a larger garden tractor. I'm pretty sure I want a ZTR to be the replacement, but it has to be able to pull my yard cart. Here are the candidates, in no particular order: Cub Cadet Z-Force Ferris 1000Z Exmark Lazer Z-CT Hustler Fastrack I think the Ferris might be considered a real commercial mower while the rest are residential/commercial so it might not be fair to include it in this list. I don't think I NEED the commercial heavy dutiness, but I do like some of the features like bigger wheels and castors. My main considerations in order are: Time it takes to cut the grass Ability to handle slope in back yard Durability to handle the rough terrain Cut quality Other questions/concerns I have are: -Is a 44" deck too small, since I am currently using a 48" deck -Is a 52" deck over kill and would it make this cost prohibitive? -Is ground speed that important? The Ferris runs at 10 mph, while the others are around 7 mph. My current cub runs at 5.5 mph -what is the minimum HP rating I should consider? Does brand name carry that much weight? Any other thoughts? Thanks in advance.