good coaxial speakers for rear 6.75 or 6.5 need suggestions

[kickerfan22]

I drive a 07 jeep grand cherokee. my current setup is a eclipse AVN-5435 7" double din headunit clarion eq 6.5 infinity kappa component speakers in the front powered by kicker zx360.4 amp. 2 12" kicker L7's in a ported box powered by a zx1500.1 amp. my rear door speakers are still stock i dont know if its worth the hassle to get components for my rear speakers because id have to mount the tweeter somewhere so i was thinking about a good coaxial speaker any suggestions??? the kappa's scream in the front so i was thinking a good mid sounding speaker but not sure what to get. ive got 90 watts rms for each speaker to spare and price range id like to keep it under $200 or around there.

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[Why So Cereal? 5,000+ posts]

Image dynamics CTX if u can fit em

Also Boston acoustics SC or SR series.