I am looking far and wide for a head unit that will support all these
functions. I want a head unit with the brains only, I plan on buying a
standalone touch screen monitor that I will connect the head unit to.

I don't care about the brand name or even if it is an off-brand from
Hong Kong. I cannot find a unit that "does it all" for less than $500.
If you know of any models that support all these functions please let
me know. Thx.