Great suggestions Joe!
I think Mauseus' galleries on Britanic and Gallic splinter empires are very noteworthy. And as a
Septimius Severus collector myself, I think maridvnvm's
work on this emperor, in particular
his treatment of
Emesa mintage, is second to none on
Forum.
Some great suggestions here so far, I'm going ot have a hard time pondering who to vote for.