To the community of folks here who have in-depth knowledge of high end audiophile equipment. What do you think about pairing this with the Massdrop x Fostex TH-X00 Audiophile Headphones that has six hours left on it. A friend of mine has suggested I get the Sennheiser HD 800 S Headphones (I've heard them with a Pono Player and OMG). They are open-backed vs. closed like the TH-X00. But they are $800 plus used for a quality pair on eBay. TIA