A friend has a Kolibri in a foamie (catapult launched).

While the engine is a little gem and super reliable and the model flys great the nano turbine concept doesn't grab me either.

I think smaller jets are a compromise between economy and convienience versus excitement.

To my mind the Wren 44/P-60 size models offer the better compromise, much like there are lots of great smaller glow powered models, but the most popular size is '40' size for exactly the reason above.

There are quite a few 'cheapie' airframes for the 44 size engines around as well.

Each to his own though, if a Nano turbine suits you go for it. But do yourself a favour & buy a good one! - John.