Turbo][

I have a question. The stock BOSE in the 98 E430. I want to know if the following speakers are good replacement for them, or am I better off just keeping stock, and getting new amps.

1) a/d/s

2) Sound Stream

3) Nakamichi

I also want to know the stock size speaker, and what size are direct drop replacements.

thanks in advance

Turbo][

So no one can give me an idea what is best solution for this?