New Stereo Question

[RPS4]

hi all,

New to this forum and would love some advice and help in the world or Car Audio, any help would be great.

I receive my new 320d Sport Touring /Wagon next month and would like to know how to replace the stock audio system with a new much better one, i am planning on buying new speakers and AMPs and also a new head unit.

I would like to know if anyone has ever upgraded the stock system on a wagon/touring if so what and how was it done.

Also what are the stock speakers in a Touring ?

Thanks
any direction would be great

[98328i]

http://www.bmwworld.com/audio/installs.htm