I will chime in my 2cents.
First off, Steve turray uses d97 string, which is by all my testing the best string material out there. Quiet and fast. I found that 14 strand of 97 on 45-51# is good!
Now for silencers, I did a test on all of them. I found that beaver balls are the best in my opinion. With beaver, I did not loose any fps over no silencer. 4db quieter then no silencer. Which was noticeably quieter.
This of course is just my opinion and my results.
Hope it helps.8)