Finally blew up my Infinity Kappa 63.5i (2-75 rms) rear speakers. Would the Polk Audio db6501 be a good replacement? Going in a Jeep soundbar (this Jeep actually does run topless ). Any better recommendations for the rear speakers?

Here are the specs on the Polks:
Sensitivity 92 dB
Frequency Response 35 - 23k Hz
RMS Power Range (Watts) 10-100
Peak Power Handling (Watts) 300
Impedance (Ohms) 4

Here is my set-up:

Head Unit: Alpine cd 9847 (18x4 rms)

Front Component Speakers: Infinity Kappa 50.7 cs 5 1/4" (2-85 RMS)

Rear: 6 1/2" Infinity Kappas:
Sensitivity: 90 dB at 2.83 volts
Frequency Response 45 - 22k Hz
RMS Power Range (Watts) 2-75
Peak Power Handling (Watts) 225
Impedance (Ohms) 4

Amp runs both front and rear speakers:
Eclipse EA 4000 4 channel amp (75x4 RMS) Only 4 ohm stable.

(Rear Sub: JL 10" 10w3D4 (250 w Continuous) runs off MTX amp)