I was the same didn't wanna move from 153 or couldn't as it crashed and burned all the time but i gotta say i have never had it so good,
if you do upgrade you will need to rescan your library as it helps with loops etc and makes them a lot more stable.
I'm sure there will be some bugs floating around but its the best its been so far,
Less sluggish , better search, and generally more solid.
i would say do it.