Im looking into buying a mini for 2 reasons. 1, i love the car, & its just extremely fun to drive, 2(& possibly more importantly) to do a full out SQ competition system in it. Has anyone had problems with resonances or rattles in the minis?? If so, what, where, how much deadener, & if u have any idea, what freq r they at?

Well I've only had my new audio system for a few days now but it has zero more rattles than it did before the upgrade. I did manager to crank it up really high and got some nasty rattle back by the sub, but it was unusably loud and it goes away at normal volume levels.