Why are there no botique car audio recievers?

I agree with Dkarmeli, I don't know of any good ones currently on the market, but there are a few which have recently been discontinued which are very good.

Look at any of the following:

Pioneer - DEX-P99RS - this still may be available, but I'm not positive. I have one and it's fantastic.

Nakamichi CD700II - easily the best head unit I've ever heard and also own one. It's long discontinued however.

Macintosh MX-5000
Clarion DRZ-9255

Do a google search of "DIY mobile audio forum" and you will find the Audiogon of car audio.

Good luck.

If you are going to use something like an iPod for a source, you don't need to buy a head unit. You can plug it directly into an amp or crossover and use the iPods volume control.

Blaupunkt

I think you meant Bankrupt.

I believe that Naim supplies Rolls Royce and/or Bentley and both Lexicon and B&O OEM for a few brands like Hyundai and Audi. I'm not sure if any of this stuff is available in the aftermarket, tho.