I can also vouch for the Suzuki king quad. Mine is a late 90s model so it has seen some use and abuse. The independent rear suspension is a big plus to me. it has gears, so no belts to spin. Low is really low, you can get just about anything moving. Diff locks. All around just a great work horse. I can also say I have a yamaha Kodiak, and a polaris at the the same time, and I always get the zuki out for "work". I can skid, but I prefer to cut where it lays, and pull a small trailer right up to it and load it there. I have a small trailer that is slightly wider than the quad. It has full size tires, and a 1750lb axle, so weight it not a issue with it at all. I have a set of tire chains for winter use and it has no trouble pulling through a foot of snow.
My #2 wood machine is a 2000 Isuzu Rodeo. 6 cylinders, 4wd, heat in winter, radio to keep me entertained. Used abused and will skid out 12" logs within reasonable length. I paid $500 for it, and it has earned its keep for sure. Beats any quad hands down, and sure was a heckuva lot cheaper. It can also drive me to the woods, and into town for a snack or gas.