robosimono,
I've been fly fishing for quite a few years now and have quit using float tubes because of weak legs. However, if I were to re-invest in a float tube for the $$$ you mention, this would be my choice. I'd go with the Outcast Super Fat Cat, but for under $200 this is the one I'd choose;

http://www.cabelas.com/cabelas/en/templa...0010&hasJS=true
Sorry for the length of the link. But, it's a good tube.