I ordered rear EBC pads from an online retailer for mine that are organic. I also ordered one set of front pads that were organic, forgetting there were two discs on front!

Anyway, after visiting the EBC site, I found they recommend their organic pads in the back and the metallic sintered in the front or metallic at both ends... They say some folks like teh feel of the organic linings and the metallic sintered last longer.
Oh well. Try teh metallics all the way next time.
Sti;ll need another set of fronts ordered though so I can change them all out.