I just leased a 06 X5. It didn't come with the DSP. The radio / CD sound is par at best, but I would like to get a little better sound. Since it's leased, I don't want to pour a lot of money into the stereo, so I was wondering, can I find a BMW amp or something that might boost the power a little to give it a better sound.

I have seen the speaker packages available from BSW, is that enough for better sound?

Thanks.