Purchase advice S40 2.4i

Servus Volvo owner, I’m looking for my first car right now. In my short selection there were from the beginning the BMW E46, Audi A4 and just a Volvo S40. The Volvo has always addressed me the most – because on the one hand it is rarer and on the other hand it seems somehow more solid for me than the other two cars. Now since today a Volvo advertises very close to my idea. BUT: According to the owner, the High Performance Sound System is installed. Woran can’t see what the difference should be on the pictures. Besides, the big problem with the S40 is the radio… other radio is not possible as far as I know, is it? What is there for alternative ways to connect the smartphone to the system? Most important to me here would be AUX, everything else would not be important even if USB was e.g. nice to have. In addition, the question arises to me like the HP sound system in general. I like to listen to a lot of music, also because I am a hobby drummer. So I hear a lot of different music styles and sometimes I like it with proper bass, can the HP system offer something? Now generally to my question, what can one say about the S40? Is the 2.4 engine recommended? Rather sporty or rather more comfortable? By the way, it is about the following cars: http://suche.mobile.de/…/details.html?… I really very grateful – you can find in the net unfortunately not much to the car… Greetings and thanks to Justin