Sorry for the poor title.

My girlfriend has a factory stereo.

I would like to replace it for Christmas so she can play MP3's. either
via a plugin of some description or replacement stereo.

I also want to get her a good bluetooth car kit, ideally I thought one
that links to the stereo

I found this.
http://www.maplin.co.uk/Module.aspx?ModuleNo=46068

Has anyone else got any combinations of options to help me solve my
problem