Where does a guy start?

[BIGglaSS]

Oh yeah, I was going to say... If you want to keep a traditional "in dash" radio, start with a retrosound head unit, and try the center speakers you have now. It may meet your needs just fine. Then upgrade from there if you're not happy and need more. That head unit has decent power, plus bluetooth and usb inputs. It also has low level outputs and tuning features if you upgrade to amps and component speakers later.