If you like speed it should be fine for you, but you loose a little control in the board. I am 5'9 and 144lbs and I have a 154, but I am more into sharp turns and glades. I like to have a lot of control in my board, my previous board was a 155 and I felt it was a tad to big for me.
Have you rode on a 156 before? if not try one and see if it fits you well.
It is all about what you like, a good friend of mine with similar stats to mine has a 157 and he loves the board, he claims that anything shorter than that would not do it for him. Personally i rode his board and it feels like a huge Cadillac, but if he likes it the more power to him.
If you feel the 156 is right for you go for it, 156 does fall withing your range, but it is at the upper half of it.
Since you like speed I think a 153 is to small for you.