components will still sound better imo than coax. just a personal opinion i guess. polk DBs are a good set, I picked up a temporary set of the polk DXI 651 and im pretty happy with it but i have them amped with about 45w rms, and imo they still arent loud enough, so headunit power wouldnt be enough.
not sure if they make em bu jeff would recommend morel maximo, and id recommend CDT, polk, alpine, and infinity kappas to name a few.