Larry, I can't help myself here (Friday afternoon, at work you know)...so thin Canadians really only need working window motors, but the more portly Floridians had best go with R12...
You're right, it's relative to all kinds of variables, including personal taste. This idea, if extended, will of course lead this thread into the kind of stuff found in the audio section concerning how to get the best bass out of your speakers.

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1986 560SL
2002 Toyota Camry
1993 Lexus