Hey, this must have gone overlooked. Sorry about that. What I've found that really seems to please people is a retro-fit. You send your OEM head unit to a company and for around $400 they take the guts out of the face plate and chassis and put in modern guts, then reconfigure the input controls to your old face. They'll add auxiliary inputs and USB in a low profile corner somewhere. You install it and it looks stock and works like stock, but has all the bells and whistles of modern head units. Be sure to replace your speaker drivers to get good quality sounds.
Belated welcome to NICO Club!