Unfortunately the JAA or EASA countries can't seem to agree on allowing SEIFR, even with proven turbines, it's a mystery...
Yeah, I've thought about the F406 and it seems to be the only thing out there that fits the profile of the PA31. It's just that turbines seem to cost alot to operate. On the other hand they're reliable and as you say, the Pipers and Cessnas are getting long in the tooth.
It seems to me that there is something missing in the aircraft market - a modern PA31/C401. Perhaps I should get into the aircraft manufacturing business!