Floating tanks are good. Flying Tanks is better. We already have those. Harriers and Hornets. I'm biased but IMO an up armored LAV would be tits. A company of LAV has destructive powers even Odin would envy. But yeah. A floatin tank would be cool. Amtracs are creepy cool though. You know you're underwater riding in them. RPGs chew em up unfortunatly.