Sound System Upgrade for W203?

[markjay]

My 2006 W203 C180K Classic came with Audio 20 and the standard speaker system for this model (i.e. no Harman-Kardon etc).

Mark and Richard retrofitted COMAND NTG2.5 back in 2010, but at the time I left the original speakers in place.

What would my current options be for improving the sound system? Will better speakers suffice? Or will I need to install some sort of additional amplifier?

I want to keep the original interior look so considering items that can be hidden i.e. will fit under the existing speaker grills etc.

Any advice will be greatly appreciated

 

[markjay]

E.g..... will this make a noticeable difference? :

TS-G1322i | Pioneer

 

[markjay]

...or this:

13cm (5.1?) 3-Way Coaxial Speakers | XS-FB1330 | | Sony UK

 

[markjay]

Found this...:

http://www.mbclub.co.uk/forums/electronics/162805-w203-coupe-bose-question.html