In 1000 hours of flying the Duke BE60 there was only one engine problem or rather an exhaust problem, the interconnection tube at the back of the engine fell of during climb out, an immediate shutdown was required an engine-out landing at Bologna. Later an AD was issued for this problem that required a stainless chain to prevent this from happening.
The 58P is a fairly rare machine, pressurized and turbocharged, lacking the barn doors for passenger and cargo loading.
Another normally aspirated option would be the Colemill President, a B55 converted with 300hp IO550 engines. Real good performance with the light-weight short cabin B55 Baron.