I'm going with a Kenwood CD Receiver with 3 4v preamp outputs....from what ive seen, this is a great product. For the rest im going with all Kicker supplies as follows: 2 6x9's, 2 5.25's, and 2 1" tweeters, and 1 12" sub with its own kicker amp built in the box, i have another amp suppling the 4 big speakers and one amp supplying the 2 tweeters, total of 990 watts rms and ive checked to make sure the amps supply the speakers with enough power (rms). i also will be upgrading the battery and alternator to make sure i have enough power for the amps....the sub is 400w rms, the 6x9's are 100w rms each, the 5.25's are 45w rms each, and the tweeters are 150w rms each. any feedback is appreciated, also is the sub with the amp built in the box okay? thanks.