I have some SLC265's that I just recently got in my car. You really don't need 100w rms for em. I'm powering mine with a MD41 (rated 60w@14.4v) and my car isn't putting out 14.4 atm, more like 13.5 until I get my HO alt put back in. I have the gains set pretty low on it and I believe the speakers actually say 60w rms on them. They sound very nice and I guess I could give em more power but my doors tend to get a' rattling lol. I left my back stockers in for comparison (swapping out for some KX165's soon) And when I set the fade to the back good god it is night and day. The SLC265's are much crisper in the highs, clearer, ya know? And the midbass response is 10x better. I'm pretty happy with em for the price, once I get my doors deadened I'm sure I'll be more than happy.
But back on topic! Mine are powered just fine by an MD41, 60w rms (though it puts out more like 85@14.4)... Like I said, gains are set low right now and I don't think I would want to turn em up much.