Conclusion: I am really happy with the sound these put out on a stock deck and even more impressed with what they do on my new head unit 4x50 watts. They sound very crisp and clear and put out pretty good mid bass. Im thinking about adding a small amp to push they power these speakers want. At 90 watts RMS these speakers should sound even better with just a little more power than what a standard deck wants to give them.
Conclusion: Kicker did a nice job on these. The tweeters that Kicker have been known for being overly bright have been toned down, and now just offer great clarity. They also hit very low. I would recommend installing these before getting a sub, as you may feel you don't need one. I have a pair of these in my doors and a pair in the back deck, and they sound great (I have owned Alpine, JL, Polk, Boston, Infinity, Pioneer, Kenwood over the years).