Not looking to start any fights here but thought I would ask to see what everyone's opinions are regarding 4-wheelers or atv's, if you prefer.

We have been considering looking for a good used machine but I freely admit that I don't know squat regarding what brand is better then the other.

A few specifications in the machine we are looking for:
- 4-wheel drive capability
- dependability, I want to be able to ride the thing without having to spend all my time fixing it
- small to mid-sized unit, I am NOT looking for a 900 mega masher
- utility machine, not a racing machine
- stability, as the kids will be riding it I want to make sure it is as safe as possible
- and all the other things I am forgetting or don't know I should be requiring.

Any thoughts?