Reconstruction or not during mastectomy

Hello I am asking for advice from anyone who has gone through this. I have lobular estrogen positive breast cancer and my lymph nodes look good from the MRI scan. My surgeon is asking if I want a full mastectomy or a nipple and skin saving reconstruction as my lump is high up and the nipple is not affected. I have a week to decide. I will need radiotherapy and he says this will not be a problem after the reconstruction but could harden the implant a bit (!). It seems a big decision and he says that because my nipple is unaffected I may regret it later if he removes it. Does anyone have any advice for me who may have been in a similar situation please??? X