I would agree with with BPF's view on the C310 being worthy of consideration. Its short / rough field capability is akin to your current aircraft. Its not so fast as an Aerostar but is a hell of a lot cheaper to run and maintain.
Don't even consider a C421 - they are a bottomless money pit.. I sold mine for that reason.
The C310 is a fantastic twin to fly and even with two cylinders missing and extensive damage to the cowling as they departed the crankcase, relatively easy to fly and get down safely. Either a Q or R will tick all the boxes of your wish list.