What a/c is right for me?

[Timothy]

I am too bored by the single/twin argument to want to re-inflame it, but your mission profile seems to me to scream for a twin, particularly if you want to dispatch in all weathers.

The thing about their safety records is that like is not compared to like. Yes, you are approximately equally likely to die in either, but only because people push the mission profile envelope so much further in twins. If you treat a twin like a single it is much safer, but if you accept the same risk level (see Risk Compensation) you will despatch far more often in a twin.

If you accept that argument and look at twins, the three that I would focus on would be Senecas, Barons and Navajos. I could go into all the whys and wherefores, but you asked what I would do and that is the answer, if I had your capital.

Personally I have much less capital and I have an Aztec, which is comparable to the first two but much cheaper to buy, somewhat more expensive to operate, but is now getting very long in the tooth.

If you look at Senecas, look at later models, definitely not the I.