Monica,
I echo the last person who said, the important thing is to speak to doctors with lots of experience and also great track records of success. Since you seem interested in wait/watch, ask the doctors what they think about that. You would need a periodic MRI, like every six months, to monitor the growth. At your size I think they might or might not recommend wait/watch. We could never tell you here, only a doctor can make that recommendation depending on what he sees on the MRI, etc.
I am proof that microsurgery is a great option, as I had a great result for my 3.5cm at House in CA. Radiosurgery is also a great option, if you are interested in that. Research those topics and visit some top doctors. If you are interested in radiosurgery then find a great radiosurgeon and if you are interested in microsurgery, talk to a great microsurgeon.
Let us know how those visits go and what you are thinking. We are here for you. PM me if you'd like to talk.
Rich