i'll have to say as of now best concert i've been too was Moving Units in SF @ cafe du nord. just cause I was in the very front and they kick ass. The Mars volta @ berkley was also good. Muse puts on a good show and so do Editors oh yeah and Interpol. Those are just the ones I can remeber right now.
Oh and the Killers, but I saw them before they started playing big venues. Got to see them in Vegas @ the house of blues when you could still smoke inside.