Hi KiteTim....
I have owned both the 9'5 Mana and the 9'5 Surf.
Both the Mana & the Surf are very easy to paddle and surf, so you can't go wrong with either choice.
You can find my reviews for both on youtube.
Search "Rick Weeks 9'5 Naish Mana review" or "9'5 Sunova Surf Review", for the full rundown.
Full disclosure.... I have been sort of adopted by Sunova, because I am so stoked on their boards....
I get to ride all of their boards while I cruise around with Sunova doing demos in the US
I am super ok with that, since I have never ridden better boards.
Some answers to your Sunova questions:
Sunovas don't have a ton of concave.... Bert uses rocker, rail foil and outline shape to create his masterful surf shapes.
The Surf
is super smooth and easy to surf.... a great intermediate board.
is very stable because the outline is full figured.
is lightweight... and the build is the best I have seen.
Women love the handle, because it is super easy to control the board, with minimal effort.
Another biggie is the Sunova Gortex valve.... the board will breath with temperature changes, without worrying about a vent screw.
And it comes with a mast track.... for some casual sailboarding.
Have fun with your search.... enjoy the next board!