RE: Should I be shooting 125grain broadheads?
Holy smokes...we are the same setup except for the string silencers.
I switched from 100gr to 125gr to fix my spine problem. It was well worth the time, effort and some cash. By fixing the spine, you will also gain some good KE.
I recommend at a bare minimum to purchase 125 gr field tips and try them vs. the 100 gr field tips.
Best of luck!