So right now I'm running with stock speakers and an Alpine CDA-9856 H/U in my '02 GMC Envoy; and I'm about at the point where I am sick of the still poor sound quality. The H/U helped a LOT, but I know there's more I can do. Right now, I'm trying to do a project for ~$200 or less that will boost the quality I'm getting, but I don't really know where to go with it next. I was looking and I can either get a decent Alpine v-power amp for around that and keep the stock speakers, or I could get a set of Alpine s-series components for the front doors and a matching pair of 2-way coaxes for the back doors for about $170. My question is, what's my best bet for right now to make things better? And why? This will have to last me until fall (~October) when I will have the money to add the next piece of the puzzle to my system. And yes, I'm doing all the installation personally.