best speakers for mid bass for rear coaxial replacement

[Fl_topless_bl_stang]

I am running the 9 speaker set up from factory and I am looking for replacements for the rears. With the convertible and without making any mods to change the factory look what truly fits in back there as a drop in with some sound deadening. Looking to run 75w per channel to these want very solid mid bass and some high but more as an augment. I will be running focal as3's up front in passive mode and an old solobaric l7 that thumps pretty good.

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