For my 2 cents worth, you might also consider the 11'4. IMHO the 11' doesnt paddle that well on flat water its just got that rocker and seems to push a bit more water, great on a wave and great to surf on the nose, and yes you could paddle the 11' flat water but the 11'4 would do it better.
I sold the 11'4 to buy the 11' as I wanted it for surf, have other options for flat water.
Peraonally just to confuse you more I like the GT deck grip with the GS fin as a single