Not sure if you can fly with the canopy off, but you may want to look at the Osprey2.
http://www.ospreyaircraft.com/osprey.htm
The Searey is another possibility, and you CAN fly without the doors. Unfortunately, I don't think it's a kit only deal.
http://www.searey.com/
It's not a plans aircraft, and you don't want to fly with the doors open or off, or put floats on it, however I think the Tango is a fun airplane and mine is located in North Carolina.
http://www.teamtangoaircraft.com/sit...raft/tango-xr/