Hey,
I reckon you demo the boats first, obviously i will lean towards Fluid.
The new oufitting is superb in the boats and i'll give you the lowdown on the Flirt and Nemesis (atleast what i felt in the prototypes):
flirt: i paddle a small Flirt and i paddled the whole of last year on the Zambezi, it is only 45gallons and i always felt confident in the big water, so as a river runner it is fantastic. As far as play is concerned you'll find super easy to through down in the flats and very controlled on ends, gives huge pop both in holes and waves. I've definately thrown my biggest moves in my flirt. Easily my favourite boat to date.
Nemesis: Not as solid a river runner as the Flirt, but still very good. But where it lacks in running rivers it makes up for play. Everything i said about thr flirt playing well the Nemesis is that much better, loops are huge and it rips om a wave. And it is fricken fast, i used the 2nd prototype on the Zam last year and i battled to keep up with it, Billy Harris said it was too fast. The next few protos got it just right and now they are in the final testing stages and the boat should be out in the next two months or so. Here's another video of Andrew Pollock in the ocean using the Nemesis, gives you a good idea how fast it is:
www.fluidkayaks.co.za/video%20clips/proto%20promo.mpg
I hope that helps if there are any other queries, Whitwaterules, you are welcome to pm me.
Good lines and big air
Scotty R