The Fishcat style tubes are a little more pricey than a standard round tube but they keep your butt out of the water. This is nice if you ever do any cold water fishing. They seem to be a little quicker to get around in also!
If it's in your budget and you have the transportation then a kickboat, AKA pontoon boat, is another great alternative. The oars give you a much greater range than a conventional tube but you can still use fins to move around while fishing .leaving your hands free same as a tube.
MT