So I'm new to this forum, and also new to car audio knowledge in depth, so let me explain my situation. I own a 2004 nissan xterra, up until a week ago, everything in it was stock. I just started getting more into audio, so I went out and upgraded to a pair of kicker ks65's in my front doors, and a pioneer deh3400 head unit. I'm currently thinking about getting a pair of kicker ks693's for the rear speakers. However I'm new to all of this, so any suggestions towards some good 6x9's, tweeters, and possibly even amps or subs, but Im probably going to put a little hold on the amp and subs. But yeah, I want to hear what you think towards the best 6x9's and tweeters, and possibly, if you have some you want to sell, just pm me, thank you very much. Hope to hear from you guys.