Dollfxce

Hi! I'm pretty much new here, & have only had my Maxima about 1 year. The previous owner had upgraded the sound system everywhere except the front doors & the tweeters. Now I'm looking up upgrade those- but I don't know much at all about audio & having a lot of other aftermarket parts already in just further complicates that (to me anyway!).. What are the best front speakers for this car? Best tweeters? I have an Alpine cb164 deck, 12" boxed sub in my truck, audiopipe apcl-2004 under one seat, apcl-1500ld under my other seat, & aftermarket speakers in rear deck (can't remember what kind)... The rear deck speakers aren't memorable to me because for some reason, I can barely get any sound from them- yet they are the most powerful I think? Of course I messed with settings like balance.. What could cause that & how can I get them to work as normal? Any recommendations on which speakers & tweeters are best would be really helpful!