Okay, it seems to me that your bench is right on par with your squat and deadlift numbers, maybe not on the high end, but still seems reasonable.
I have three suggestions at this point:
(1) Work a lot on horizontal rowing
(2) Work your internal shoulder rotators - read "Achieving Structural Balance"
by Charles Poliquin
(3) Do your bench press powerlifter style. Search for the Dave Tate bench press article.