Im most likely going to pick up the Pioneer AVH X8600, but its not cheap. Only came out March / April. Has already dropped £40 though.
http://www.caraudiodirect.co.uk/pioneer-avh-x8600bt
Its probably a bit much for most people. But i run 3 RCAs, i dont like low volt pre outs. So that kind of limits my choice.
Then it has to be Android, and actually have some decent functionality. Which pretty much rules out most units.
This has Mirror Link, so will basically be a larger version of my phones screen, with all my apps etc on the screen. So i can use Google Maps for my Nav, MixCloud, Pocket Casts, iPlayer, TuneIn etc.
To me, its pointless having a double din, unless i can use it for Nav. Other wise id stick with my single din i have, that i just use via BT to play all the above apps. But this has meant having the phone mounted somewhere.
Erm how come you have to make a surround ? I was under the impression there was facia kit that can be bought ? Maybe for an RSX ?