How they sound:
SQ wise, the Perfects are quite a bit better. Granted, they take some power to perform optimally. I have a 100W/ch amp waiting to be installed. With the stock amp giving about 15-20rms power, the Perfects are definitely more attenutated then the stock speakers at a given volume setting. I had to fade the rears by -2 to compensate for the attenuated fronts. I now have to have the volume up to around 12 o'clock to get the same volume I got at 10 o'clock w/ the stocks. Sound wise, they are pretty incredible. With the stock setup, I had the bass upped to 2 or 3 and treble up 2. Now I play these speakers with the bass/treble gains completely flat and they still rival the stock setups detail! With the treble up 1, they are way to bright, but at 0, they play nice and smooth. With 0 bass gain, they still hit harder and cleaner. I was quite suprised with the bass presence these had on such little power. At higher volumes, the sound is more natural and composed and vocals/bass do not have the flutter that the stock setup had. All in all, a great setup and improvement, although the stocks can hardly be considered bad.