I just recently bought HD555s, and am wondering if I should be setting it on "headphones" or speakers.. I asked a bunch of people that have the same headphones as me and the answers were mixed.. So I figured I'd come and ask you guys

I've been looking to upgrade from my ****ty old Icemat Siberia's to something quite a bit better. My price range is ~160 max. (i'm in Canada, cheapest I can get 555s are 140) I play Counter-Strike mainly, so I need to hear footsteps and all that jazz.. The headphones of choice around the...