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I still wave at Boxsters, but they no longer wave back :-(
2002 Boxster S "Violet" (sold but not forgotten)
2009 Carrera 4S "Kelsey" (current ride)
2015 FIAT 500e "Nikki" my commuter car
I think your plan is sound but I think you will miss the Boxster on the street. A water pumper 911 feels heavy for me compared to a Boxster. Take your time deciding!