The EQ is decent enough to tweak the sound more to your liking. I am thinking of picking up a mic for the auto EQ function. i think they are like 15 bucks on amazon. reviews say it does a great job making everything sound a bit better.
and I agree with Ying, it really makes the stock speakers sound decent. Although i added my Inifinity Basslink, even with it turned off it sounds really nice.