I actually had a VT-01 in the house along with the new phono stage that has not yet been produced for market. I did like the VT-01 but did not find it greatly different from the 21A, though it had stock tubes and power cord. I think the case work in much nicer on the VT-01 and would consider it an upgrade, but not a huge one. I am wondering now about the LA-01 though am a little shy of stepping away from tubes for a pre-amp. I am also going to give the 5.5 II another try as I don't think the one I have is working as it should.