Im thinking about replacing my factory speakers and wanted to get some recomendations from others who have done this

I want to do all six speakes, dash, door and rear

I want to keep the Alpine HU

I have a sub, already separately amped,

Im running a Pioneer GM6200F quad channel, on the factory speakers

Also Im thinking of adding a 2nd sub to my cargo area, my current sub is in an Audioforms/elegonics under seat box (great box by the way)

They make a great cargo area box too so Im thinking of adding one,
Any feed back on that?

Thanks in advance