Hi, I am overhauling my car's sound system and the upgrade I am most excited about is my HU. I bought my car used and it came with a Sony Xplod headunit that I have never liked. It doesn't read half my cds and the aux input is scratchy at best. I purchased a Clarion CZ501 and will be installing it tomorrow. I mainly bought it so that I can have a HU that actually works, but should I expect improvement in sound quality from the upgrade?