Fos4JDS Labs ODAC + O2 amplifier. (Or get O2 from Massdrop, or SDAC if that's active, or god good old ODAC will be fine too)
I am going to get SMSL Sanskrit for a DAC, and if you can test it somewhere, I think the SMSL Sap amplifiers should also do fine. Definitely get something externally powered for an amp though, my Fiio E10K could drive these at high volume, but the sound was very unbalanced and soundstage was narrow.