Thinking about a VK-50SE Pre-amp? Any opinions

Hoping to get a bit of feedback from any VK-50SE or 51SE owners out there. Thinking of taking the plunge and it would be a big purchase for me cash wise. I have a LS-25 MKI w/NOS tubes now and am extremely happy with it. But the upgrade bug calls as usual. I have read all the rave review and BAT sounds like a great company. Just wondering how much improvement I could expect as I would be likely be buying unheard from Audiogon next time one shows up. I am a music lover first and do not want to just gain extra resolution and give up musically over the ARC. Any thoughts, commons, recommendations would be much appreciated. Thanks!