Just a couple of teeny weeny things you will want to include in your cost benefit analysis.
If you kit the Piaggio to the same spec as a PC12/TBM850 it will cost you $6,300,000 - yip thats right.
Whereas there may be 15 TBMs and 10 PC12 operating in the UK, you will be an orphan, there is currently no Piaggio operational in the UK.
I personally like the cut of the Piaggio but it is not to everybodys taste, so although you may like it and buy it......when you come to sell it, the market is limited.
Of course there is the thing about Piaggio themselves. It is not unusual for a manufacturer to go through hard times, but Piaggio seem to be constantly on the edge.
Best of luck with your flying