Peter
All these aircraft have plus and minus points so it usually comes down to what someone is looking for and what turns them on
I have flown a few TB20s and something did not work for me in the concept of the design which was to make an aircraft feel more like a car in its interior layout.
That is ok but as in a car the interior design can quickly look dated as new materials and mouldings come into play.
The strong point appears to be the range.
Pace