Thanks IO540,
You approach this from a angle that I have not thought about, the insurance company, which is not a insignificant part of the equation!
I guess KN64/KR87 is the way to go, I have no room for instruments or equipment in the main panel (Dual Avidyne).
So once I have the "damage" of planting a KR87 in front of the right seat (there is no other place to go) I might as well go with the cheaper option of the KN64 and stick the 2 on top of each other.