AM/FM/CD player to replace BMW radio?

[TexasTerp]

The CD43 is a bmw factory radio, lots of guys replace the oem with this one in order to retain an oem look. Search, there are plenty of threads on it.

[funcrew]

CD43 is fairly easy to integrate.

I'm assuming that this is a case of one old guy yanking another old guy's chain just for fun, which I can respect. I followed you just fine, except for "CD43" and "integrate."

[StereoInstaller1]

CD43 is fairly easy to integrate.

[funcrew]

Wow, I'm lost. I haven't installed a car radio since 1985, and that was just a straight AM/FM/cassette replacement into the dashboard of a 1968 Ford - no new amps, speakers, etc. I try to read this forum, it sounds like secret code, and I realize that car audio has come a long way since then. Is there a "Car Audio for Dummies" article somewhere?

Anyway, I would like to be able to listen to CD's in my E30. Even though I understand those are now obsolete, I have a lot of them, and accumulate more all the time via Amazon used marketplace.

Is there an AM/FM/CD unit that is a straight replacement for the OEM radio, or are we talking advanced scientific tinkering to do this? A trunk full of radio junk is not appealing to me. What kind of a budget am I looking at?

BTW I would MUCH prefer a round rotating knob for volume and tuning if possible.