New board, new size?

So I thought with my current board i would be happy (and of course i am), but it's an all mountain board and sometimes i just wanna mess around the slopes via butters, jumps, and maybe grinds perhaps? So, I was thinking of getting a fun board, specifically a Rome artifact. I looked at dozens of forums and product reviews and after mulling about whether of getting a kink, WWW, stairmaster, etc... I chose the artifact. But i digress. I'm about 5'10, weigh in about 155 lbs, and have normal sized feet (Apparently large feet is a big issue with alotta boarders). My current board is 156, but i heard if you want to start doing little jumps and butters, you should get a board slightly smaller. So do i get a 153 or even go down to a 150?

Thanks for you feedbacks in advance.

[BurtonAvenger]

Eh if you want it for jibbing you can go down to the 53 or even the 50. Personally I just say stick with what you feel comfortable with.