you'd want to start with a good head unit, not all head units are made the same, cheaper pioneers tend to be a little bit more harsh with the highs, if your going with the cheaper head units, go with alpine Also there's not much room for expandablility with that head unit you chose only 2 sets of 2 volt preouts which is pretty garbage. That kenwood amp is just a subwoofer amp, nothing more. If you really want to power up your speakers AND subwoofers go with the precision power phantom p900.5 five channel amp nothing is gonna beat that in price and performance. Also those JBL speakers are very clear and as close to high end sounding you can get under 200$