I know it isn't much cheaper than a Rhythmn'n'Blue

But I quite like the headunit.

Looks a little like an Alpine, has loads of features. And does A2DP (so your walkman phone can be played through the headunit over bluetooth if it supports it).

Probably sounds decidedly average, won't be at all audiophile, and at least they are honest about the RMS outputs.

But it has to be better than some of the really nasties, and you can't fault the input options.