Hi Head Fi Help, I need your support. I've just moved into a new flat and I need to get a pair of decent headphones to be able to listen to some music for hours. I think about a HD660s. Would you like to recommend me any good amp for them (budget up to $400)? How about DAC? Is it worth to buy it? What do you think about Schiit amps /dac for these headphones? I'm gonna also use the HD660s to play some hardware electronic/techno live acts (Mackie 1604 vlz4, DSI Tempest, Roland TR-707,Sequential Circuits Pro One, SH-101, SH-2, AKAI MPC 2500 and others). Do I need to use any amp for HD660s during my jams on hardware connnected to Mackie 1604 vlz4? Many thanks for your suggestions!