After 4-5 years of using k701s I've decided to upgrade to something different. I'm planning on buying some he-500 soon, but first I need a better amp. I've been using the stock one on the xonar essence stx and I figured I would probably need something beefier to do the he-500 justice. I've looked at pretty much every thread discussing this subject and the most recommended products seem to be the Schiit Lyr and hifiman EF5, with audio-gd c2 mentioned a few times as well. For any of you who have tried both lyr and ef5, which one did you prefer? I'd like to spend under $500 if you guys have any other suggestions. I mostly listen to electronic music if that's of any help, and since I'm used to the rather cold and bright sound of k701s I'd like to try a hybrid/tube amp for the supposed added warmth. Thanks for your time.