ive had 2 of my clients hang up their blx90's for black 94's. this was before the dual cores came out as well. A fellow pro of mine was using the n90's (the same ones im trying to sell for him in the class. section) and he is using the blue 94 now. i can't really give in depth thoughts / feelings on what they think but i know all of them seem to be happy with their decisions.