Wavelength Brick USB DAC tube rolling?

Excellent --thank you. I'll have to give those a shot as well. As for an upgrade, I made the move to the v2 last year and, as you pointed out, the difference was enormous. I'm considering moving to a v3, but I'd like to learn more before I do.

I see Sangam is listed in "heavy rotation" on your system page --Eric Harland is amazing. Terrific album.

Thanks for the post Heymikey and Restock. The EI tube in my Brick just died and was searching for recommendations. Quite pleased with the La Radiotechnique you suggested. Thanks!