My ratings for the current line of John Deere riding mowers: Their is just a rigid rating from the way that I look at it. If you want to do everything from heavy mowing to a snow removal business or want a loader, tiller or front brush, you need an x7. Big acreage or mowing business, snow removal in the winter, pull a cart, the x5 will suit you well. If you have small acreage, small things here and there, x3 is your mower. If you just want a riding mower to mow your lawn and do your snow (with blower) IN TOWN, then the D100 series is for you. I fall at the low end of the spectrum- the D series. Each step down, the ruggedness of the tractor takes a step down. at the top, you have the x749 and x749SE. This is the most expensive riding mower Deere currently makes. Big diesel engine, 62 in. deck, large HDAP tires, AWD, AWS, power steering, Twin Touch pedal hydrostatic drive, 2 hydraulic lifts, and many more things I will just chose not to list.. you get my point. On the lowest end of the spectrum, you have the D100. About $1,500 gets you on a seat of a John Deere. Way simplified. Small gas engine, 42 in deck, Small tires, 2WD, 2WS, manual steering, 5 speed transmission, manual lift. There is literally a tractor for everyone. I hate when people say the D series is junk. They abuse them until they are junk. John Deere designed these for light tasks. Mowing once a week, pulling a light trailer, blowing snow on a smaller property, etc. That's just my 2 cents on that topic. What do you guys say?