@arafiq - yes, I was thinking that this was one of the most hyped up things I'd ever seen a few months ago, both on vids and in forums and articles, but I had to check it out.
It all depends on what kind of sound one likes. Somebody who is very into super detailed and uncolored sound would be very, very well served by DAVE, with or without M Scaler, though that thing is amazing.
I like a more colored, tubey sound so I've been using tube headphone amps and tube 2-channel preamp; currently it's an Audis Nirvana for the headphones. With Utopia headphones, it puts out a very deep, spacious soundstage that is a delightful listen, and while it's got plenty of detail, that's not it's strong point. Same with 2-channel - just got more of the kind of qualities that I like with the Holo May, but the Chord gear is great too, but a tad 'dry/clinical' for my taste....