Scutey
Headphoneus Supremus
You should find the 1990 less bright than the 770, the 1990's highs are smoother, (slightly) less extended and also has warmer mids, they should aslo pair well with the Espressivo, there isn't a lot of info on it as you say, but it has been mentioned a couple times on the Elise impressions thread, but I know from my experience with the Elise that F.A gear is very good, so I think you're in for some good audio fun!.Thanks for the kind words! This is my first pair of Beyers, only having heard the DT 770 in the past, seems they should be a good counterpoint to the Sennheiser house sound. Glad to hear the Elise is treating you well, I've read great things about it. I have no idea what to expect from the Espressivo MKII, there is very little information out there on this new and improved iteration. It's currently on its way to me from Poland. Have some excellent tubes to put in it when it arrives hopefully some of what has made the Elise so popular has trickled down.
Enjoy your new gear!