aircraft
You might consider the Rockwell commander 1000, one with the new EFIS and auto pilot mode, comfortable for 6 pax, hi performance, single pilot, fast, efficient, and if in the future you need extended range, has the capability. The 1000 series was the best of the Commanders, and the company that is putting the full EFIS cockpit has also designed an autopilot to mate with the EFIS mode. 300+ knots, FL350 service ceiling, probably about 1 to 1.2 million, best guess. The 303 Cessna was underpowered, and had a short production life, due to its weaknesses.
Cheers