I have to side with the ARC. This is of course subjective. I like the ARC sound over the BAT. I use an ARC with my bel cantos and love what it does. Just the right hint of harmonics. The Bel's love accuracy and I don't think the BAT has that trait in spades. I have listened to the BAT alot. It is a sound you either love or dislike. I didn't care for it. Doesn't mean you won't love it. I just like my ARC with the bel cantos. Try to hear them both if you can. Two very different sounds to say the least. Good luck.
Audio Research Rev2 Mk2+Balanced Vk50 SE
Can some one give good advice, On the two Preamps,Audio Res Rev2, Mk2.+ the Balanced Audio VK50 SE. Both or Balanced an used the fame 6h30 tube. thank John J