Stereo upgrade advice

[Youngy82]

Hello all

i recently purchased an A3 2011. I am looking to upgrade the head unit as it has the concert system. I would like dab etc. I’m sure many have wanted the same thing. I would like any info on options either fitting a later Audi unit or something that looks fairly factory. I have seen some which I think may work but would rather avoid any cheaper options if you see what I mean but of course it’s not worth spending a fortune. 
regards

Andy