I'm getting a full friction plate stage two clutch fitted, also getting a Wavetrac LSD put in all at the same time.
I got talked into the non-intercooled standard one because it will probably make as much power as the Jackson Racing one anyway, and you can always get an intercooler later.
The intercooled version for the FN2 also has a smaller radiator that replaces the OEM one. That I don't like the idea of, so if I do get one it will be a custom cooler. TDi-North are looking at designing one for the Rotrex.
Main thing that attracted me to the Rotrex was as it is a centrifugal charger, the boost increases with the square of the revs. So in normal every day driving it is developing little boost, and so it can be reasonably economical.
As the revs build, so does the boost and the torque, so the effect is quite similar to VTEC.
Also the Rotrex doesn't whine like the Jackson Racing one, so it's a bit more stealth!
All round seems like a very good option.