I will be installing MB Quart QSD216s and a JLAudio V2/Slash 300/4 in a 2008 Civic LX Coupe.

Already installed Pioneer Premier DEH-P600UB
Bazooka 10200 powered sub

I have read the tweeters on the QSDs are harsh. I wanted to flush mount them in the doors with the rest of the speaker but read they should not be installed on axis in the doors. I also read to avoid the pillars with these. What else should I do, angled in the door?

Any suggestions would be welcome.