C310R Anyday
You will not beat a nice C310R on any front. Best useful load. Biggest cabin. Biggest nose locker and therefore easy to keep in C of G. Simple engines to maintain. An honest 180 Kt TAS. Very reasonable purchase price. Yes they have SID's but if it has been completed by a reputable LAME you will have no problems. The maintenance will still be far cheaper than a B58 of similar vintage. I know this comment will be howled down by the critics however have a look around and do what the Jones's do.
Groggy