The protonbob website has lots of stories from men who have been to Loma Linda: certainly worth looking at if you havn't already done so.
Bob gave me contact details for 7 men in Australia who have been to Loma Linda. All of them replied to my email or called me and all were very happy with their experience there.
Your PC could be tiny like mine. My first biopsy a few years ago had one G6 and one PIN: my recent biopsy was all clear.
Johns Hopkins had an article on "insignificant PC" in their 2003 newsletter about how to help gauge if you have an less agressive situation.
If you consider agressive treatment, it could be worthwhile to have another test, or have your slides reviewed as biopsy readings are subjective. Loma Linda would want to review your slides themselves.