I've got a pair of the ER20s, and they were good to start with, but I've moved up (too late for tinnitus, mind, tho I'm blaming 30 years of motorcycling without earplugs, too) to ACS15s, and they're really, really good. You have to have them in for a few minutes to get over the slight sense of dislocation, but it's only an adjustment for your head to make: I usually put mine in as we're setting up, that way by the time we start playing I've pretty much forgotten I've got them in.
They're good for going to loud pub gigs, too - went to see a friend's very loud rock covers band the other week, and I was able to spot what was wrong with the bass (way too shy in the low mids) when my mate, tho he could tell something was up, couldn't tell what exactly because of the wall of noise from the cymbals and geetars masking everything.
Best £148 I've spent.