If you have not already I would do some reading at atvnationdotcom. Look and compare problems with each. Not that it means crap what I think but I tend to see what Louisianarebel is saying. We have alot of bikes that ride the nasty swamps with us and I see 'em all. My old 98 foreman 450s is still drinking the swamp water so I have no need right now for a new one but I still ask questions about durability and this is what I hear first hand:
3 of the BF's that ride with us have aftermarket rebuilt engines. The power is bad ass but they have been gutted. The other 2 are having minor issues. We have one that is just ridiculous. Don't remember who did the engine but it has gorilla swingarms and axles. Damn near need a ladder to get on it.
The grizzly's are still tugging along not too far behind the BF's. Not many complaints from the drivers.
The CA's only complaint is the factory ride height. For such a nice bike they seem to sit a lil low but have enough umph to bulldoze their way through the mud. As for dependability, I have not seen or had anyone break down on a ride.
No one rides a suzuki or BB so I have no idea how they hold up.
There are 2 AC's that are seeming to be holding their own.
No one rides polaris bikes anymore either but we do have one nice ranger that rides and I have yet to see it struggle at anything we have gone through. He usually pushes me out. To my surprise, one really nice razor is just plain unstoppable. If it had a bigger utility bed I would consider one. Just too sporty for me.
The hondas, well it is a honda. while not the fastest through the rough stuff they still just keep going and going. Some of the most abused bikes in the rides are the older 300 4X4's that are still choking on muddy water. Snorkeled and the bike disappears crossing the slough's, they are still amazing lil machines. My 450s has had it's share of parts and now is starting to smoke, it has never left me stranded on a ride. I hate to replace it but I am afraid all of the minor issues have finally snowballed and she can not stand to swallow much more swamp juice. I am not sure what honda's biggest bike is called but there is one that is lifted running some big tires and I have yet to see it stop.
My next toy will be a lifted rhino with a snorkel kit. We did my buddies and it is amazing. I like the functionality and the ability to play.
Here is a pic of the ranger and the snorkled 300 on one of the high ground resting stops.
Here is my dinosaur.