I agree with the post above about Nakamichi's. I have a Nakamichi CD-400 in my 300ce, and it looks perfect. It's really simple looking and, better yet, sounds amazing. In the US, Nakamichi dealers are very difficult to find. You'll most likely have to go to a really high-end place to get one... Mine cost around $450. Kinda spendy, but you really get what you pay for. Also, since it's so simple and stock-looking, I have a hunch that thieves will generally look past it.