I will be testing the NBS Statement to the Nordost Valhalla in the next month or so. I have tested the NBS with the SPM and found the NBS to have better extension, clearity and detail. I believe the NBS would be an excellant match for the AR components in that AR tends to be more revealing than other tube gear. If the system you have tends to be warmer than the AR standard, you may want to look at a silver cables, Audio Truth and Transparent Audio would be good starts. From what I've heard, you may want to wait for my review of the Valhalla, you could write me and I'll be sure to keep you informed. J.D.
