Yeah I use those wide bore Senn doubles, so I get crisp treble with my pairs. More crisp than the ER4S for example, without that ~7k dip. A few earlier pairs I had were definitely smoother treble-wise, and needed a little more volume imo.
Was interested in those Jays tips but they cost like $15... I should prob just go for it lol. Do you have an S200 source? Still need to give those Philips tips a shot as well.
You should also try the meelec double flanges, they sound even better than the Senns to my ears. The fit with these takes some getting used to though, the first couple of days I was struggling to get a seal.