I just replaced my rear factories with these... and man what a difference. No more awful distortion at higher volumes from bass. I put everything back to just them pumpin out metallica and there weren't even breaking a sweat. Did the same thing with my factories and it sounded like crap. If you're lookin for a good speaker to replace the factory ones, I would highly suggest these.

They have a very smooth, nice hitting sound at high volumes. Even at lower levels you can still feel them hitting nicely. I got a special discount on them, but i think they're worth crutchfield's $99. just my .02

 

I was duped into buying some Infinity Kappa series for the rear of my Reg. Cab and little to my knowledge did I know that I need an amp to push them, but I have heard nothing but great things about them.