Looking into maximizing SQ in the front of my Accord, without running into the problem of having certain peaks in the spectrum that can cause irritating variations in how the songs sound. I'm not saying I like a completely flat sound, but certain peaks in the beginning uppers range can sound painful if not accentuated with loudness all over.
With that taken care of, looking at possibly adding kick panels to the car, and already have a slot in the door made for 6.5-6 3/4" speakers. As well as having a tweeter panel in the upper dash. These kick panels would add either a 5.25 or 6.5 slot as well as another slot for a Tweeter or a Supertweeter if neccessary.
Would it be a better idea to add in the 5.25s and have one of almost every speaker style in the car? (5.25, 6.5 Tweeter, possible supertweet, 6x9's in back in enclosure or low midbass tuned 6.5" subwoofers, 2-3 10s in back or 1-2 12s) or try to keep sets? (4 6.5s, 4 tweeters, 2-4 6.5 subwoofers in back for low midbass, 3 10"s and maybe one 12.)
I like my SPL, not competing with anything it just does add a quality factor to a system for me, however have made some SPL focused arrangements with the regret of not having enough quality.
To sum this up i'm not sure if it is neccessary to have a 5.25 as well as a 6.5 up front, as well as 2 amps or a 4 channel, or 4 6.5s and one amp. Amp space in my car is hard to come by so that is a consideration.