I have a little less than an acre, fairly level but one side drops off about 10 degree slope. There is a stormwater runoff trough 150 feet along the rear edge that I cut, and one side of it is almost 45 degrees. I may buy the lot next door (about an acre) and it has a large area that is sloped about 40 degrees. Been cutting it for three years now with my Craftsman 42" LT with an 18HP Kohler. I started out thinking I would need ( want ) the SD, but the more I look I have been convinving myself that the standard FasTrak would be more than enough for me. Same deck (?), same trans, same seat, etc. Only difference I see is bigger engine with large air filter and bigger tires. I'm being offered FasTrak for about 5K and the SD (Kaw or Honda) for about 6K. Suggestions?