I found this pretty neat little plane. Used mostly in Australia for power line and pipeline inspection/maintenance. It has the benefits of both it seems. Able to fly a bit faster/farther then a helo but still keep the visibility of one.

The Seabird Seeker

And yes there is an FSX model for it at Flightsim.com
Just search for Seabird in the FSX file category.

To bad there isn't an amphibious version