Cymbals with Fidue Sirius do sound dry with Opus #1/#1S, although the rest of the spectrum just pairs nicely, and mids are epic in terms of separation and power (yummy guitar crunches and bass slams!). When I had my Cayin N5, changing the digital filters made cymbals rendering more natural.
IT03 overall pairs nicely due to the treble being more relaxed.
When I have time I'll try my Fibae ME with Opus #1S, but removing the 4.4mm cable is a pain I don't want to go through too often due to the tight connectors of the Fibae.