Tips on re-doing all speakers in a SC with Nak.?

[sniper]

Only driver door mid speaker is working in my SC, the Sub is ok but sometimes at high levels it distorts bad, and the tweeters work. I am looking to replace the rear deck speakers as well as the sub along with the door speakers but not the tweeters. Are all the speakers 6 1/2 with the sub being an 8"? All the speakers im finding are 2 way with the tweets in the center, who sells them without that? should i even be worried about not wanting 2 way speakers. My assumption is that it will sound better with 1 ways. Also on the sub, is it going to sound any different if i use a "Free air" VS a normal 8"?

 

[Lextreme II]

I have some oem speakers if you like to have them.