It looks like we have only 2 good options, but it may be awhile before BSW gets their E89 package together and available to us. So Jehnert is about all that is available. The system looks awesome, but I am still awaiting a price. Probably in the $1500 range though. All the speakers you need and looks good too.
Pics below show the componets and door panel that you get in the kit. 12 speaker system. 1 in each stock kick panel location, 1 in the door panel stock lacation, tweeter in the stock location by the mirror and 3 in the add on panel with a tuned crossover for the E89.