I didn't. @songmic did. I was just correcting the Vali/Valhalla mistake. With that said, I agree with the recommendation. From my experience, OTL amps pair very well with the headphones you listed (as does their cleaner sounding cousin, the SET amp) and I'll assume that's why the Valhalla 2 was recommended. Better synergy. If you are looking for alternate recommendations, then get a BHC+SB. Love mine, including it's deficiencies. Just so much character in that amp. Or perhaps a Project Sunrise (and build one of AtomicBob's power filters for it). Although I haven't heard it myself, it was recently reviewed and recommended by @Luckbad and @Marvey as being very good/extremely decent. But honestly, I like the Valhalla 2 as a recommendation because it's a good solid amp that plays well with those cans and gives you Schiit's return policy if you end up hating it. Just don't go crazy rolling tubes. Back to you songmic.