I'd say best as in most effective I've seen (or not seen lol) is Multicam, however ATACS is equally as effective as far as I can tell. Until it is fielded by a notable military or LEO unit I'd lean towards multicam. Now if we are talking 2nd kind of cool, I'd say ATACS Urban or ACU Urban Digital. Personally, I can't afford either so I am using a combination of woodland and my old ACU's. The ACU's suprisingly work will in the winter as they kind of blend in the the dead brush you find in abundance in the winter however when things are bright and green not so much lol.