Absolutely agree that 009S is by far the best bet and most effective play given your gear. Carbon matches better with 009S than 009. I find there are sweeter sounding DACs out there than Yggy, but moving to the 009S will definitely allow for a much wider range of DAC pairings without hitting the fatigue zone. Cables can nudge things a bit one way or another, but it's very minor. DAC rolling is next. But 009 to 009S is much more significantly audible than both of those combined.