Navigation Unit

What size in-dash head unit with navigation/cd player/ & am/fm radio can I fit in '10 nissan altima?

It is a sedan 2.5L engine with standard audio. I want the head unit to have touchscreen navigation with a cd player and radio capabilities. I have 2 open slots where my radio is supposed to be and i was wondering on the size of the head unit that will properly fit inside those slots

Public Comments

1. Go on crutchfield.com, and look it up.
2. it's a double din