I´ve been running the DX50 for almost 2 weeks on 1.2.6 & the last couple of days on 1.2.7. The improvements over the last period are impressive. Fast scanning, personalize it with your own wallpaper, better EQ, gapless works fine (again) etc.
But at the end of the day the main reason I bought this fabulous player was the sound quality! This morning I put it back to fw 1.2.2 and fell in love with it all over again.
So iBasso: 1.2.7 functionalty with 1.2.2 SQ = killer combination! Please, please, please...