So with the new pricing on the 75 I've decided to not go for the 3 and move my deposit over to an M. Since I didn't really give it much thought before - a few questions: 1 - Is the high fidelity sound worth it? I tend to be a little picky about that and am coming from a Burmester sound system. From what I've ready neither would be as good as that. 2 - Those white seats looks amazing (but for how long?) - anyone have them and have they held up? Are the premium seats worth it or are the standard seats good enough? I would be leasing. I'm pretty set on the rest: 75, Premium (this may even be questionable now), Black Exterior, Enhanced AP. Thanks!