I hope there is someone here who will actually read through this detailed topic and give me some good advice! Here is my situation. I have a 2011 Toyota Corolla Le. Its stock system consists of 6 speakers; 2 tweeters, (2) 6 3/4" speakers, and (2) 6x9" speakers. I have a 12" rockford fosgate P2 and an eclipse mono amp that can push it, but they are just sitting in my garage. My plan is to buy the sony single din reciever MEX-XB120BT which has a class D amplifier built into it and it produces 45 watts of RMS to 4 channels @ 4 OHMs. I want to use it to power new speakers so I don't have to spend hundreds more on a separate amp and wiring kit. My previous ride had a jvc aftermarket double din reciever pushing 14 watts RMS with DS series kicker speakers( four 6 1/2" speakers ) and it sounded good, but not amazing. So I am wondering if pushing the speakers closer to their max RMS wattage actually makes the speakers sound noticeably better. With the new sony receiver I plan on buying (2)JBL GTO 629 and (2) JBL GTO 939. The 629's RMS watts are 60 at 3 OHMs with 93DB rating and frequency response of 53-21,000 HZ . The 939's RMS watts are 100 watts at 3 OHMs with 94DB rating and frequency response of 46-21,000HZ. Or I plan on buying speakers that max out closer to the Sony's RMS output wattage such as the NVX N series speakers. The N series 6x9" RMS watts are 55, frequency response 58-20,000HZ, and 89DB. The 6 1/2" N series speakers RMS watts are 40, frequency response 70-20,000HZ, and 89DB. So basically, I'm looking for quality sound and im not advanced in this knowledge enough to make a decision yet. Just reading the details the JBLs are much better speakers. But, from the choices i gave you, would the JBLs still sound better then the NVX speakers even though I won't be able to push the JBLs to their full potential? P.s. I plan on throwing in the p2 sub and eclipse mono amp for bass and unplugging my tweeters.