I've been tweaking my system alot since the summer and I've been able to make it sound much thanks to reading posts on the polk forums and trying out some settings suggested by arun1963. I had foolishly posted on the forum advising to run the eq as flat as possible ; I couldn't have been any wrong. I started comparing how the sound was in my car to how it is through headphones. So I began trying to cut out frequencies with my eq to make everything sound better and more balanced and i've had really good results.
I began with cutting out frequencies and ended up with these settings sounding the best to me(7 band graphic, no parametric):
50hz - flat
125Hz -4 db
800Hz -8 db
2kHz - 8db
I also boosted the tweeter +3db on driver side and cut tweeter -3db on passenger side using the attenuation switch on my crossovers. The tweeters are in stock location above woofers but still half of the way up the door. I like this position keeping the tweeter close to the woofer as I do not have TA adjustment . So the driver side tweeter is off axis while the passenger one is on axis i believe, this is where L/R independent eq would help but i don't have it on my headunit, pioneer 600ub.
I have also staggered the LPF on my sub and the HPF for my front components. I have the LPF at 50Hz (18db/octave) and HPF at 80Hz (12db/octave) I would prefer steeper slopes but these are the ony ones available on my headunit. In addition I use the LPF on my sub amp (Polk PA 400.1) to add another 12db/octave as I could still localize bass in the rear of the car otherwise. I'm not sure what it is set at as there is knob with a scale of 30-250Hz with no markings in between, it is currently set between 11 and 12 oclock. This is just at the point where the bass moves completely up front and the midbass-bass transition sounds good.
I appreciate all the help and I plan on continuing tweaking over time. Next up might be adding a processor with more eq bands and TA, any suggestions around $500 or less?
Front Components: Polk DB 6501
Rears: gains all the way down Polk DB 691
Sub: Polk DB 1212