thanks for the few of you that replied to my other topic........anyway....... planning on getting 07 530i .......automatic steptronic, sports and premium package..... what do you guys think of the premium sound package? is there a big difference in sound quality between the logic 7 sound system and the basic sound system that comes with the car? if i decided to pass on the premium sound package and go with an aftermarket sound system, will that void my 4 year/50k mile warrenty should any electrical problems occur? thanks for the help guys!!!