[PHC1]

Nice cans!

We all have our own taste and preference so here are a few suggestions in your price range.

For pure solid state my favorite choice would be the Audeze Deckard, sadly it has been discontinued and very difficult to find but look around. It has a DAC.

Next would be Woo Audio WA6 with tube upgrades because I really enjoy cans over tubes. This is my favorite budget tube headphone amp. No DAC in this one.

Or you can go with a Schiit Audio Lyr which you can outfit with a multibit DAC if you need a DAC. Don't let the single 6SN7 tube scare you. They are easy to find and replace.