I had started off with iPods/iPod Touch, then a Zip, then went to a Hifisound Anniversary III (worlds worst UI and reliability in my experience), a Samsung YPP (blah), then the Fiio X3, which I liked sonically, hated UI. Next got the iBasso DX90, better UI AND SOUND, replaced the X3. Currently, the Pono replaced the DX90, it sounds better AND has much better UI. Have only used DX90 once since I got the Pono, one day when I wanted music for my dog walk, and the Pono had died (had used it while removing snow and quite a bit more time). Instantly missed my Pono, cleaner, more detailed, DX90 had a kind of scrim or haze the sound (in comparison, mind you-until I heard the Pono, it sounded quite nice to me). So that is my DAP experience, and I'd strongly recommend the Pono (don't let the hippie stuff turn you off). And, haven't used it yet, but it has Balanced Out!!! (others swear by this)