Aftermarket Head Unit and Speaker Options

I don't think I saw a consolidated thread of aftermarket head unit options for the Prime (LE). If you have an aftermarket one do you mind posting some pics/info about it? How does an aftermarket unit affect the backup camera and other vehicle functions? Is the factory amp built into the factory head unit?

Also, what are some decent speaker upgrades that can be done without having to change the wires? I'm ok with splicing/etc. Looking for speakers that can be driven via original HU/amp or aftermarket HU.

 

Well this would be for the LE which is pretty much plug and play. I saw some threads here and there but nothing like a consolidated list/options.