speakers

Has anybody done a full audio replacement? I tried to search and the most I could find was people adding a subwoofer. I’m picking up my truck on Saturday and want to pull out the 8 speaker B&O system and replace with component 6x9s up front, 6.5” two ways in the rear and two shallow mount 12”...

Looking to swap the speakers in my incoming STX to some better ones. I plan to do the speakers first, then add an amp later on. Can anyone recommend a set of front, rear, middle speakers. Brand, size, etc Thanks in advance