need help selecting an approptiate amp...

[smlzalero]

So my amp was finally stolen. It was an Alpine MRP-F240 (40w x 4). My insurance got an MB Quart DSC480 (80w x 4) I guess I didn't realize how mismatched my amp was to my speakers until now.

I have Infinity Kappas:
4x6's: KAPPA 462.5cfp
Power Handling, RMS60 Watts
Power Handling, Peak180 Watts
Frequency Response (±3dB)75Hz - 21kHz
Sensitivity90dB
Impedance4 Ohms
Mounting Depth1-3/4"

6x9s: KAPPA 693.5i
Power Handling, RMS110 Watts
Power Handling, Peak330 Watts
Frequency Response (±3dB)35Hz - 22kHz
Sensitivity90dB
Impedance4 Ohms
Mounting Depth3-3/16"

So my question is should I get two smaller amps (60wx 2 and a 110w x 2) or should I just leave it? I don't like the MB Quart amp, it doesn't allow for the same adjustment as the Alpine did so the performance of the rear speakers is crap unless I want to add a sub, which I don't. These speakers were awesome with the Alpine but I'm concerned about the rears being underpowered?