I'd have to say as far as doing its particular job...I like the Avanti Piaggio...Fuel efficient props that go faster than some of the jets out there!
I also think the Dash 8-400 is probably the best regional airliner out there. 70 seats at about 300 kts...thats pretty sick witted.
The Pilatus is speed with fuel/cost efficiency. One engine means less work/cost during the inspections.