"animations and backgrounds"
TRUST ME, animations get OLD! Sure, whenever friends get into your car and see whatever stupid animation, they will say "oh that is neat" but that is all you will get out of that.
All of these extra features to me are worthless and you are paying for something you will get over.
My thoughts about head units are to get something that is high quality and easy to use. Many features will just confuse you on how to use it.
Just make sure you can adjust your sound levels (EQ and such).