I was recommended a 182 by a previous Earthrounder Bob Gannon who had completed 2 flights around the world in one and had visited a very large portion of the globe, so a 182 was a strong consideration.
The SR22s, Comanches and Bonanzas were some of my first choices because of their popularity, however I was drawn to thinking outside the box to something like a diesel or a less common high performance aircraft.
It seems that because of the relatively development of diesel piston aircraft, the only suitable Jet-A1 single engined aircraft for an around the world trip would be something with a PT6! However a DA-42 does seem like a very viable option!