Hello everyone. I have both Sennheiser HD600 and HD650. I've mostly been listening to my HD600 because it seems to sound better with most music I listen to (playlists from Monstercat & EDMs in general). But I think that's only because the HD600 requires less power to run than the HD650, thus sounding better for now. Although HD600s sounds slightly better/clearer, HD650s is easier to listen to for a long time without fatigue unlike HD600s. I kind of regret buying HD600 after second guessing my choice of HD650. I should've used that money to buy an Amp and Dac instead. I'm still only a beginner so I just want the best value entry level HD headphone (HD650s) and an Amp and Dac that pairs the best with it. The Schiit stack (Modi2/Magni2) is said to be the best value Amp/Dac combo, and it's probably sufficient to run the HD600. But it can't get the most out of the HD650s which is why I'm spending a bit higher in budget for Amp/Dac so that I won't have to upgrade too soon. Anyways, I'm currently using the Audioengine D3 as my DAC and I don't have an Amp. My budget is $1200AUD. In your opinion, what are the best headphone Amp & Dac that pairs the best with Sennheiser HD600/650s at a reasonable value? Thanks for your help.