I weigh what you do. Get the 148. I know that sounds freakishly tiny but it was magic. I'm a lifty at Breck so they days it dumps and everyone can't get here I still get to ride and that was the only time I DIDN'T like it. Cause at 148 it was pretty much impossible to really ride powder. I could get through it but not in a fun way.
I could press, jump and mob on my 148. If that absolutely scares you and you can't bring yourself to buy that small a board then you'll be fine on the 152. But you'll really be fine on the '48. I still miss it. Even with how much I like my new SubPop.