yes u should upgrade the pads if u can afford it.
Hawk HP+ is the best choice. More initial bite and much better heat control over stock.
i have slotted rotors also, which helps eliminate brake fade since it cleans the pads when the get glazed over (what causes fade).
if i were u go for the Hawk HP+, under $100 for the front set. and WELL worth it.

a lot of people dont think the AEM or Axxis pads are worth it, including myself, since i didnt see any difference, just less dust.

~kris