About the best single din on the high street is the alpine cde 149 .
Hands free , Bluetooth streaming , pandora. Digital radio , iPod ready etc . Etc. all for sub 300 .
About the best for a factory look is one of the becker series . Not sure on models as I Have not bothered looking for a while .
Nakamchi also look good and can be had on a really good price if you only want the basics of cd , radio , and iPod through on aux , but second best to a Becker for factory look .
As before , I can't give Model numbers as I have not been looking , but I fitted one to my last 964 I sold and it was around 150 . This was about 4 years ago though ....
If you want double dn there are many options , but I will be removing the clarion currently fitted and installing an alpine 927 .
Everything that's current all in a 7" touchscreen with 4volt outputs , and her other car will have the 928 8" version so its not too confusing
The top-line pioneer offering appears to be on a par , but no 8" version yet .