One of my speakers in my 2005 Pontiac Sunfire Coupe (Same as a Chevy Cavalier) stopped working and I have been trying to decide if I should spend $200-$300 on a HU and cheapish coaxials or spend $500-$600 on an HU, amp, and nicer speakers. I am wondering how well a 4x 22W rms HU would work with 6x9 speakers that recommend 40 or 45 watts? What would people recommend for a low power 4x6 and 6x9 coaxial to run on an HU? What brands make good inexpensive speakers?