What's amazing about those Kenwood amps is they're so tiny yet put out lots of power. It's hardly larger than a phone. Makes installation really easy because it will fit anywhere. Especially on our cars where space is at a premium. I have some "old school" Class AB amps that sound great but would be hard to fit in the Crossfire. That being said power isn't everything and I don't know how the Kewwood amps sound.
Going with more power doesn't mean it will blow your speakers. More speakers are fried by distortion from low powered amps than with clean power from a more powerful one. So with more power you get more headroom and less distortion.
Kind of like the difference between the NA Crossfire and SRT-6. Same car but one has 60% more horsepower. Can the SRT-6 get you in trouble faster than the NA? Sure if you mash the throttle down hard it's going to light 'em up. If you're responsible with it then it's fine.
Same with a larger amp and speakers. Setup your gain structure properly and don't hammer them hard and they'll be fine and will sound much better.
http://www.gcaudio.com/resources/how...eloudness.html