Given that criteria it sounds like the G37 sedan would be a good choice. I've never driven a sedan but my Z is great and I think it would make a fine sedan
A guy I work with has a one that he is really happy with, I think it's a g35 though but he likes it and the g37 will only be better
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"At no point during your rambling, incoherent response did you ever come close to anything that could be considered a rational thought. We are all now dumber for having listened to it. I award you no points, and may god have mercy on your soul."