I'm in the same boat, wife's 06 X5 3.0i amp (no dsp) blew, literally, and now we are debating on what to replace it with.



I am leaning towards the MusiCar level one kit (amp & tuning only), but wish I could afford the level two (with rear sub). Check em out, it is quite expensive compared to the $250 or so for a replacement amp but they add a lot of value in preparations, plug n play ability, and tuning.