Amen.
I just ripped all of my a/d/s/ stuff out of the car and replaced it with Diamond Audio for mids and highs and Eclipse 88120s for subs -- plus I just added another amp (Xtant x1001) to power the subs.
I had all a/d/s/ before. The SQ was awesome, but the SPL just wasn't there. And, like many others here, I remember once saying that I don't care much about SPL, I just want to make sure that I have good SQ!
Six months later and everything is getting ripped out (I get the car back tomorrow).
Since we've all been there before, we can hopefully save you some time and money now. Go for good SPL+some good SQ now. If not, we'll see you here in about six months, when you are asking which setup will give you the best SPL.
Take care.