I'm looking for a new DAP. There are things that it absolutely must be able to do, though. 1. Folder Browsing 2. Gapless playback with both Flac and MP3 3. ReplayGain 4. Bluetooth with aptX 5. 2 micro sd slots (optional, but preferred) I have a Shanling M2s, which fills most of those...

I'm new to the iBasso line. I normally use Cowon players. I was attracted to the idea of 2TB of storage, the OTG option and a replaceable battery. Mine came with firmware 1.50 installed. I love the sound that comes out of this thing.   I was reading that they fixed the gapless playback issues...