Shiny,
I also underwent a TURP which came before the PCa diagnosis: in fact, it was the TURP that found the cancer. I decided to deal with the cancer with Active Surveillance against the advice of two urologists. It has been almost three years since my decision to use AS and I still have confidence in that decision.
I have dealt with the AS with a semi-annual PSA and a yearly 3T mp-mri (without the endorectal coil): both my urologist and I have decided that any additional TRUS biopsies (after 3 negative TRUS biopsies in the past) will not provide any additional information. On the other hand, if the mp-mri shows something suspicious, I will accept a targeted biopsy.
As for your case, you appear to be a very good candidate for AS. I find it unfortunate that almost every person who has come to this message board with a diagnosis of Gleason 6 has chosen to treat with either surgery or radiation. However, as long as the doctors we consult are not on board with AS, it will never be used in any wide scale. One of the pieces of misinformation that is passed on by both doctors and patients is that people on AS will inevitably be treated sooner or later. This is just not true, as shown by all the studies coming out of the various AS programs (see the studies out of Johns Hopkins and the Sunnybrook Ontario AS programs). In fact, 60% to 75% of people on AS are never treated, and those who do progress to the point of needing more radical treatment do not face a closed window: See the John Hopkins AS program which has not had a single person dying from PCa since the program started in 1995. This is why it is called ACTIVE surveillance.