On your question about Stage etc:
Yes T1 indicates PC which can not be felt on DRE or seen, and T1c is a tumor identified by needle biopsy, done for example because of elevated PSA.
With recent extensive screening more men are now diagnosed at an early stage and low Gleason score, often T1c and G6.
N figures relate to any spread to lymph nodes.
M figures refer to existance of metastasis.
There is no "normal" PSA reading, but rate of change as discussed here is important. Several things can affect PSA, including size of the prostate. A larger prostate produces more PSA, so size of the prostate needs to be factored in. Your doctor will be able to give you the size and calculate the "PSA Density"
Gleason figures go as high as the worst score of G10. Reading biopsy slides is subjective, and it can be worthwhile obtaining a 2nd reading.
Most men here agree that choice of doctor is the most important consideration, regardless of the treatment method, as expertise makes a huge difference to long term outcome. Unfortunately a high number of treatments does not in itself guarantee a good result.
Books on PC by Lee Nelson and Peter Scardino MD are worth reading, as they are very comprehensive.