Thanks for the replies, Daribo. I'll give your global EQ settings a go. As I noted, my Suhr S-4 is notoriously bright, so further DB's of taming might even need to occur.
Also, Daribo, I wasn't using the PEQ for my monitor and then leaving FOH flat. I've been running everything to the Q12a that I send to FOH, including the PEQ'd signal or whatever. Obviously, an FRFR is supposed to be an accurate representation of what FOH is getting, so I definitely don't think i'd EQ things differently for my Q12a, unless I knew for a fact that the Q12a is way brighter than the particular PA we'd use. Since it's FRFR, I dont think that'd be the case.