I know you're hung up on a low wing, but you're denying yourself the option of the Cessna 210 (or even better, the turbo version T210).
Much quicker than most of those listed above, 6 seats (or fold the back two down for extra luggage, and it already takes lots), good short field performance, comfortable for pilots and pax, flies an ILS like it's on rails ... etc etc. Pressurised version available (and even a turbo-prop customised one if you're loaded, check out the "Silver Eagle")
I wouldn't write it off until you've tried one ....