I would like to listen more to my Sennheiser Momentum's over ear. Tube amps always intrigued me. And would like to try. Now i did some investigating and narrowed it down to: - Little Dot 1+ which is very well for. Low impedance headphones and saw the output is bigger on a MK2 - Little dot Mk2 is the Soundstage much different than the 1+? -Bravo Audio V2 And this one, which looks awesome but not much to find about. http://www.ebay.de/itm/272138815209 What will be the best choice? Hope someone can kick me in the right direction.