My Vali seems to be getting better and better. I really didn't do any critical listening for the first 100 hours or so but did like its presentation. I got a ringer but it really didn't bother me as it settled within a minute but did have some residual and consistent low level ringing in the right channel. So, I took it apart, gently lifted up the pads, used a plastic coated paperclip to slightly bend the leads and then laid down the tubes again. This did work to substantially reduce the ringing for me. YMMV. Over the last few days, other than the subsided ringing, the SQ quality seems to have gone from good, to very, very good. Black, dynamic, extended but most of all smoother on top (it's still grainy at times but I am using it with the HD800). From day 1, I found the Vali a compelling listen but seems to be enjoying it more now. I'm pairing it with a newly acquired Naim DAC-V1 and switch between using the Vali and the amplifier in the Naim. Initially, it was no contest, the Naim smoked the Vali in liquidity, detail, soundstage and dynamics. Not so sure now. Maybe both the Naim and Vali are continuing to break in. We'll see as time passes. Although I still prefer the Naim for its smoothness, the Vali (being a little more forward and edgy) continues to surprise and that's a good thing. Given that I'm using it to drive the HD800 is truly a credit to it. Pretty much the best bang/buck money I've spent on HeadFi yet. Makes me wish I still had dome of my previous cans to see what they would be like with the Vali.