I've only had two 4-wheelers in my life. The first was a 1987 Suzuki LT125(2wd) that I got brand new and used until about 2002 when it was just put up. My second one is a 1999 Suzuki 250 Quadrunner(4wd) that I bought new and have been using it ever since. I haven't had any major issues with either one. With the experience that I've had with these two units, I'd be hard pressed not to buy another Suzuki.

Most folks that are brand bias have a history with that brand.

Good luck with whatever you decide.