The Meitner Labs DAC/transport combo --> HEV90 --> HE90 rig I auditioned was still the best at taking me "there" with just about any music I could throw at it. Not the last word in neutrality but musical and magical to the nth degree.
The HD650 driven by the Dared VP-20 did occasionally take me "there," it was seriously the best I ever heard the HD650 sound, but the VP-20 being a speaker amp can't quite handle the load, and there was clipping on some albums.
Strangely enough, the ES2, even out of the plain old X5, gets me "there" from time to time. Not because it sounds real, but because it sounds musical and well-balanced enough that I no longer care for realism. I just get lost in the music.
I think this has as much to do with synergy as it does with the quality of individual components. You need to have a system that does very little wrong much more than a system that does anything specifically right. I'm not talking about politeness either - since politeness is usually a coloration coming from insufficient dynamic range and tactile impact - but about a system that is very well rounded and very close to neutral without sounding clinical. Sonic problems tend to be much more effective at jarring you out of the sonic illusion than sonic merits are at pulling you into the sonic illusion. Which is why the ES2, which is relatively sonically inoffensive and very dynamic and involving at the same time, can really transport you, even if objectively the individual sonic components of its presentation aren't all that good.