Chemo or no chemo?

I was diagnosed w/ invasive breast cancer on 7/6/01.  My pathology report showed:  .8cm w/ positive margins, high grade, extensive perineural invasion & extensive high grade comedo DCIS.  Tumor markers: ER/PR+, Her-2 negative, S-Phase 8.5%.
On 8-17-01 I had a lumpectomy because of the postive margins plus sentinel node biopsy.  3 nodes were removed; they were all negative.  There was no residual tumor, so the docs are saying my tumor was still .8cm. I know I will need radiation therapy because I had a lumpectomy. My question is this:  I've gotten 2 opinions regarding further treatment. I have one dr telling me that I don't need chemo, Tamoxifen will be enough. And I have another dr recommending chemo.  The 2nd doc says chemo will improve my 10 year survival by 6%.  The first says that chemo will improve my 10 year survival only by 1%.  What do you think?

[CCF-RN,MSN-JS]

Dear Mun,  Recommendations for adjuvant chemotherapy are based on various factors, tumor size, lymph node status, as well as whether there is evidence of metastasis.  This gives information to

[mun]

Oh, I forgot to tell you I'm 47 years old & 2 years post menopausal.  Thanks

[Colonel]

I am a male with breast cancer and also a liver transplant recipient.  Have had a masectomy and 11 positive nodes out of 18.  Chemo will be very risky because of my liver.  What if I only took tamoxifen?  Also considering a test called PET which shows whether the cancer has metasitized.  Any info would be appreciated.  Thank you.

[Colonel]

I am a male with breast cancer and also a liver transplant recipient.  Have had a masectomy and 11 positive nodes out of 18.  Chemo will be very risky because of my liver.  What if I only took tamoxifen?  Also considering a test called PET which shows whether the cancer has metasitized.  Any info would be appreciated.  Thank you.