There are lots of unpressurised turboprops of course but few if any aerobatic 4-seaters.
The G140 would be attractive in Europe because
- it is sub-2000kg which knocks about £30/hour from the cost of an IFR flight; no pressurised turboprop is < 2000kg and that (together with the poor fuel economy of the PT6-based planes at low levels) and general high maintenance is what makes pressurised travel so much more expensive.
- 250kt+ speed
- range to cover much of Europe in one leg
- easy grass capability
- it can climb rapidly (2000-3000fpm) to 25k feet which gets you above nearly all weather (except TCU/CB etc and you would go around those)
- turbine reliability
- decent quality avionics (not the G1000, which I believe will in due time be found to have combined the unreliability of all current avionics into one nice compact package...)
- good build quality, I am sure