I haven't paddled the Fun series yet. I paddled the Wavesport Siren a bunch tho and I like it a lot... the only thing is I'm too tall for it (5'7"). Definitely worth trying out several types though and seeing what you like. I think the dagger boat someone referenced is the Kingpin.
So, I say: Wavesport Siren, Jackson Fun, Wavesport EZG, and Dagger Kingpin are all worth trying.
Keep in mind, though, i'm not much of a playboater.
I DID work at a kayak shop a couple of summers ago so I do know my boats tho