Best Speaker that will fit?

[Smkn_TA]

I need new speakers for the rear passenger seat panel. I have a rattle in one. I have the monsoon system "99 WS6" and replaced HU with a kenwood excelon kc792. All I know is that it is a 6 3/4" speaker.

What I want to know is, what speaker will fit depth wise? I still want to put the plastic grill cover over it when I get a new one. I know it has to be dual ohm voice channell something or other cause there are 4 wires on connector. What speakers do you reccomend. Looking to spend around 150 for a pair. More if they are worth it. What do you reccommend?

[Engine_HP]

the sail panel is a 6.5" round speaker.
i belive that the trans-am is a 4ohm speaker and the camaro is a 2ohm speaker.
u can replace them with a kicker cvt 6.5, u can find them in ebay for $120 per pair shipped.