Not to rail on this, but gelocks is right. While the Magni isn't perfect, it definitely gets the job done. You don't have to be insane like me (plugs $300 headphone into >$3k amp) to get great performance out of the Mad Dogs. As much as I use my Cavalli amp with them, I also use a Magni and original Asgard on an almost daily basis.
Sadly I broke down today and Purcahsed a Matrix M Stage v2 [with upgraded Power supply] [used with extra op amps] so I went and got a n ice solid state. I may revist these some time in teh future. I think deep down I really wanted a pair of sexy woodies. But I'll definatly be trying these again in the future! Espically now that I got a Solid state to pair em wid!