Hmm, tall order! There are not too many TRUE balanced tubed preamplifiers around. Off the top of my head, ARC (LS26), Cary SLP-05, BAT VK50 series, and Atma-Sphere MP-3 are good candidates.This is the deal. What tube pre do you recomend? I will be using the Pass X-250 after it. I would like to keep it balanced as well. I have heard it is magical with a tube pre. Is this true???