Whats a good snowboard for me?

I'm female, 5'3",weigh around 115 & shoe size is about 7. It says a good snowboard for me is around 146cm but I want it around 153. Would that be a good idea? I tried both boards & the longest I've tried is a 155 & it worked out great. I have experience and do mountain type snowboards but kinda leaning more to freestyle as I go on and get better. So any ideas?