Really it comes down to is how much the OP wants to spend for his system. He might be fine with just amp'ing his head unit when others(like me) want a better all around sound for my speakers(I'm running JL). It also depends on whether you have the premium or base stereo. I could tell a difference between my fusion(premium) and my mustang(base) sound quality.
yea.. I figure head unit is fine if use a processor with it.. but what I find is if you can live with interface on stock head unit. More of interface issue then SQ issue.
2011 GT Coupe Premium | MT6 | 3.73's | Security Pkg | BREMBO | Comfort
Installed JLT oil catch can, Tint, Beltronics RX45/shifters