Well I have a 1991 honda civi lx I think and I just add 2 rear speakers in the back

http://www.pioneerelectronics.com/PUSA/Products/CarAudioVideo/Speakers/G-Series/TS-G1642R

And I just add a new deck as well

http://www.pioneerelectronics.com/PUSA/Products/CarAudioVideo/Source/CD-Players/Pioneer/DEH-P3000IB

Was these a good choice to add as for sound? For clearity as well as the bass? cause I was shopping for a good system and this guy said that kappa 6.1 infinity were good. But my dad said no and bought thses instead. So did my dad make the right decision or not. Well this car is going to be a project for my sister and I and were starting with the sound system.

So my question is. Did my dad make the right decision? And what else can I add to my sound system to make it the Blasting?(From other speakers, to amps, to subwoofers.) And also something what can I add to my my car do something like this but for a car?

http://youtube.com/watch?v=y_fr68B9em4  

infinity stereos are good but not great. i have a 400watt amped infinity stereo in my eclise. if i want to replace it its gonna cost a bundle cause the wirin harnests are crazy. i prefer kenwood or elcipse decks. speakers and subs are all kicker, solobaric not comp.