its a tough decision. maybe you wont want to know about my experience, but decided that if I were in your shoes I would want to have as many experiences as possible.
I had bilateral mastecomies with implants in feb. this was after b/c in 2009 which involved chemo and rads (and a WLE). The reconstruction failed after 4 months due to the rads which led to poor healing and an infection.
My surgeon specialises in this type of surgery and he said he had not had a patient with my issues before. However, I have read that in the US there seems to be more experience of the difficulties I had and I gather that infection can be an issue with implants. Having said this, come across plenty of ladies with implants with no problems.
Like you, I fear surgery which is so invasive. Not sure what I will do yet.
Good luck, Rattles x