First of all, welcome to the site. You will find a lot of caring people here.
While you should discuss your question with an oncologist specializing in PCa, I will venture an opinion. Just remember, I am not a doctor. Your PSA doubling time is very slow, so take your time. It may take many years for cancer to grow enough to be a danger. When and if this happens, you always have ADT to fall back on, meanwhile, you can avoid the unpleasant side effects of ADT.
Father died from poorly differentiated PCa @ 78 - normal PSA and DRE
5 biopsies over 4 years negative while PSA going from 3.8 to 28
Dx Nov 2007, age 46, PSA 29, Gleason 4+4=8
Decided to participate in clinical trial at Duke - 6 rounds of chemo (Taxotere + Avastin)
PSA prior to treatment 1/8/2008 is 33.90, bounced on 1/31/2008 to 38.20, and down at the end of the treatment (4/24/2008) to 20.60
RRP at Duke (Dr. Moul) on 6/16/2008, Gleason downgraded 4+3=7, T3a N0MX, focal extraprostatic extension, two small positive margins
PSA undetectable for 8 months, then 2/6/2009 0.10, 4/26/2009 0.17, 5/22/2009 0.20, 6/11/2009 0.27
ADT (ongoing, duration TBD): Lupron started 6/22/2009
Salvage IMRT to prostate bed and pelvis - 72gy over 40 treatments finished 10/21/2009
PSA 6/25/2009 0.1, T=516, 7/23/2009 <0.05, T<10, 10/21/2009 <0.05, T<10