Hi,   I've been mostly a browser and found lots of information very useful here.  I'm currently looking for a small desktop tube amp for HD-600.  I came across a Carot One Ernestolo which looks interesting.  Does anyone have any experience with tube amp?  I listen to soft rock, jazz...

I had a chance recently to try out the W3 and UM3X side by side.  My impression is both are bass heavy as compared to Shure and UE models.  The W3 has more of a 'thump' bass and wider soundstage.  The UM3X has a slightly tighter and cleaner sound.  I'd choose W3 if it was the weekend and I'm out...