Car stereo guru needed.....

I have a 4 x 45watt amp in the unit itself and the speaker maker recommends an amp that`s 1-1.5 times the rms wattage of the speakers @ 4 ohms to run them efficiently without square waving. The speakers are rated at 80 watts rms so I`ll need a 4 channel amp that`ll put out 80-120 watts at 4 ohms. Who makes a good dependable amp under 200 dollars? The amp inputs will have to be speaker level inputs too.