This is my first time with doing this so i need some help :/, im ready to get my double din set up and i was going thru the dash kits and i found the metra and the other one tht starts with an "s" cant spell it sorry lol but heres my question do i need jus the dash kit itself or do i need the whole kit the harness and the attenna and everything else that comes with it??? I drive a 07 honda fit sport

 

Oh and what dash kit is the best? With fitment wise