hey guys Im looking into installing some new toys in my 04 s80 t6 and I was wondering if I could get some help. Im curious as to what size speakers i'll need to buy and also what brands i should look at im looking at getting a double din head unit also. Im not completely sold on all new speakers and tweeters but im definitely certain that I want subs and a head unit(mainly cause the head unit i have is the one with the analog phone in it that doesnt work), I want either 2 10's pointed up at the passenger seats or directly up at the ceiling, or two 12's in the trunk.

has anyone installed subs with a factory head unit cause I'm not looking to get everything done at one time necessarily but if possible id like to do installation in this order over time: Subs, Head unit, speakers.

pictures of your setup would be nice as well as links and a list of what went into installation.