Where are you?..Someone here might let you have a go of theirs..or check with your local shop to see if they have any demo boards..That's the best way to tell.
I love my Naish 10'6" and I am looking at buying a Naish 11'6" as well..for my daughter to use and friends to use..because my 10'6" is quite tippy at only 28" wide..btw..so is the Bonga at only 27" wide..
The Starboard Extremist would be a good choice...How heavy are you..Your weight has a lot to do with which board is right for you.
If you're ever in Melbourne you would be welcome to try mine..or pop down to SHQ and try some of theirs..they have Naish, Mistral and a Southpoint Kalama..all good boards..imo.
DJ
...and I'm about 76kg. I don't really mind something a bit wobbly, as long as it performs to a good standard - the balance factor is just more of a challenge! 
I think I will have to find somewhere to demo a board - there must be some shops suppling the boards around here because every time I go riding along the coast, I see at least one SUP'er paddling around the reef breaks near Cottesloe beach.
