JenIrene I'm so glad to hear that you had a good response to chemo! Yes it is true that a mastectomy vs lumpectomy doesn't appear to affect the risk of recurrence. It truly is a personal choice, for me I knew mastectomy was it. Prior to being diagnosed with breast cancer I had a biopsy every year for 7-8 years. So I had enough of mammo's and biopsies ,it was a fairly easy choice for me. There is no wrong choice you just have to do what feels right to you. Think about the pro's and cons of each, invasiveness, recovery time, risks, reconstruction or flat closure, future mammo's or no mammo needed etc.
As you said whatever will give you more peace of mind which is so important!
Best wishes with your decision, be well.