Right now I'm on the fence between:
Schiit Bifrost Uber + Lyr 2.0
ALO Island + Schiit Mjolnir
Right now my setup is an Asus Essence STU (Muse) and a Valhalla 1.5 (tube rolling but no gain switch) with my HE560's. The HE560's struggle a little with the Valhalla but I LOVE the sound they produce with almost every can I throw at them including my cheapy KSC75's which is the best sounding they've ever been. My HE560's sound great through my Asus onboard...