I looked at Cessna Skymasters and Aerostars, and also with a dreamy eye towards Commanders (they were often out of my price range). I'm a certified high wing fanatic, so anything but a high or mid-wing was out of the question. Ruggedness and utility combined with cabin class travel is what I was looking for.
I came really close on a couple of Skymasters, but in the end an older Aero Commander proved to be the clincher. Wasn't what I had planned, but I'd always loved Commanders so when this came along at a good price, I couldn't resist.
Maintenance has been as expected, maybe a little higher. But this is my first year, so it takes a little extra to iron out the squawks. She hadn't been very well maintained in the last years, hence the lower price. Insurance was a real problem initially, but when I got AOPA's Inriance Agency onboard all my troubles went away. Within a week they found an underwriter at a good price. Performance is book, but because of her age I throttle back and fly a bit slower, normally. My cruise is around 140kts, but she can do 155-160kts if pressed.
I love my Commander.