anywya i only skimmed your post before but you're saaying how one mid is louder than the other, one tweeter is louder.. ect.. welcome to the world of car audio.. you can never get it *perfect* usually cause of where you sit...
the best thing i can recommend is either one 30 channel EQ (which is what id id) or if i did it over again i would get two 15 channel eq's for each side... or evne better two 30 channels.. get a mic.. rta software (i use true RTA) and a laptop.. have fun =]
it will make a world of difference