Some very sobering reading on the Osprey here:
http://www.g2mil.com/V-22safety.htm
To summarize: it's too sensitive to pilot induced oscillations in roll; it creates such a huge downwash that it's hard to land on all but smooth pavement; it's susceptible to wake turbulence to a greater degree than other aircraft; its electrical, mechanical and hydraulic lines are subject to too much stress and vibration; it is vulnerable to a particularly nasty variation of vortex ring state and, drumroll... it doesn't autorotate, at least not in any practical way.
All these problems to one degree or another are inherent in the tiltrotor concept and cannot be eliminated, just mitigated. That means the BA609 will suffer from the same shortcomings.
I think I'll pass...