Whitch do you think is better max iv, hoot etv, argo atv, or surtrack?

I wouldn't want any of them. I know people who have Argos and Max ATVs and they are frequently breaking down or constantly parked because the owners got frustrated with trying to keep them working. I would suggest a Polaris Ranger or another side by side made by a major ATV manufacturer. It won't be amphibious but it will be reliable and you will have a better dealer network for service, parts and accessories. If you think you need the flotation that 6 wheels provides you can get a track kit for it.