Replacement speakers for MK3 with Bose?

[Roadster_Robbie]

Advice please on upgrading stereo

Hi all, I have an 06 2.0 NC The speakers are frankly not up to the job, I would like decent ones in so that if roof down…which is is pretty much all the time I can listen to “stuff” What would I require in the way of speakers? I would also like them behind head Do I need to replace head unit for better sound or will the speakers be enough? cheers