I stumbled upon Schiit a year and a half ago when looking for a tube headphone amp. I did not have headphones picked out, but the Valhalla 2 and this forum directed me towards the Sennheiser HD600s. I have loved the pairing. I eventually want to try more headphone amps and headphones, but my budget is limited and I am content for now. Also, there are several other audio upgrades and purchases higher on the priority list.