I currently have two 8" Bazookas in my 2004 X5 (from my previous car, they are like 13 years old). I meant them to be temporary, just to test my amp/LOC add-on connection to the stock system, but they sounded so good I left them. Laid them in back, end to end firing out to the sides (they clear the sides of the X5 by 3-4", about right). I have a 12 year old amp that gives 70 good RMS watts to each and it is so loud I have the DSP eq bass almost as low as it will go AND my amp gain almost on minimum (I think my X5 voltage is higher than 12 volts where the amp was rated, so I am probably getting more that 70 RMS watts)...I like them and they don't take up much space and the whole thing looks fairly clean. I will likely do the BSW Stage 1 upgrade, for more highs/mids, but the system is not bad at all as-is. I have the Aux input (for high res MP3) and that plus NAV/tape (for older music) is making me pretty happy. I just wish I had a bass control once in a while because they really get loud for some music (I have to turn tone bass control and eq pretty much off--)..