...amp to choose...? The speakers that I'm buying are the INFINITY 693.9i 330W 3-Way 6 x9 Inch Speakers, and I cant decided between, Polk Audio PA500 4 4-Channel Bridgeable Power Amplifier, Kenwood eXcelon XR-4S Reference Fit 4-Channel, Kenwood X600F 4 Channel Power Amplifier, Infinity KAPPAFOUR 125W x 4 Full Range Class D Amplifier. In case you need to know I have the JVC KD-HDR60 receiver.