Well, I picked up an old (I'm assuming it's old b/c it's an 8ohm sub) DB10 from a buddy of mine. It is in a small sealed box already, and sounded excellent in his car. I'm trying to put together a nice stereo setup for my 1988 BMW M5 right now. It uses 4x6 speakers in the kick panels, with small tweeters in the mirror triangles, and 5.25 speakers in the rear deck.
I wouldn't call myself an audiophile by any means, but I want nice, clear sound without breaking the bank. I don't need huge bump, which is why I'm very happy with my DB10 in a small, sealed box. Also, I really don't like the look of a lot of new stereo components, which is why I really like the Nakamichi CD deck.
Head unit: Nakamichi CD-300 -- I can not find another unit that is styled the way I want. The big issues are: (1) I think it is only a 2 channel output, though I'm not 100% sure, and (2) I think that the head unit only puts out 30x4 watts.
Speakers: So far, the Infinity reference speakers seem to fit best with my situation. The 4x6's need 40w RMS, while the 5.25's need 45w -- those are both the multi-element versions. The component 5.25's and the plate component 4x6's have slightly different requirements as well. I haven't decided yet how to handle the small tweeters that will go in the mirror triangles. I may buy a component set so that I can get the crossovers at the same time.
Amp: I have no idea what amp to even begin to look for. If the head unit is a 2 channel, then I don't know if I can still keep a front/rear fade as well as my left/right balance, while still running the subwoofer.
I don't think that the head unit will be enough to drive my speakers, but I could be wrong. I have tried to run through a few different amp/speaker/sub combos, and running 2 amps seems like it may be the best deal. The DB10 needs 300 watts RMS, while the speakers will probably need about 80 watts for the front (depending on how I handle the tweeter setup) and 90 for the rear.
This is my first time putting together a halfway complicated stereo system, and I want to be sure I choose the right components. Any advice would be great, thanks!