I've said before but if you consider the C4S and the GT3 and you're not sure, go with the C4S.

You are talking about ride comfort, PSM, heated seats, sunroof and Bose. All legitimate "wants", but a GT3 buyer finds a C4S satisfying but a bit "soft", is offended by the intrusion of PSM, sees only extra weight, reduced torsional rigidity and a higher centre of gravity attached to the word sunroof, and thinks Bose and loungeroom go together.

Seriously, don't talk yourself into the GT3.

Best,

Tim