All you need is a good dac and a headphone amp or a dac with a built in headphone amp.
Benchmark Dac 1 with USB is perfect for you because it also have a very good headphone jack. I used it with Sennheiser 650 cans and the sound was excellent. A used Benchmark might come in under $1000. THere are probably other brands with headphone jacks and USB for less money.
Benchmark Dac 1 with USB is perfect for you because it also have a very good headphone jack. I used it with Sennheiser 650 cans and the sound was excellent. A used Benchmark might come in under $1000. THere are probably other brands with headphone jacks and USB for less money.