Hi Bar81,
I am using the volume control of the DV2. The volume control here is as good (in terms of sound quality) as the best out there!
I just purchased the EMM Labs DV2 and agree it's a major upgrade from my previous XDS1v2 which I'm now using as a transport. I also eliminated my JRDG Corus since I listen only to digital (anyone interested in a great sounding, beautiful preamp).
I bought the XDS1 in 2011 after comparing it to the other top contenders at RMAF that year. I've only been listening for a week, but there's no question the DV2 has real sounding mids/highs and a wider, deeper, slightly more forward soundstage.