Dear Cayin, one of your main competitor in China already released a direct challenger to Idap-6, Aune S5.offers better technical specs such as DSD1024, PCM768, DST, External USB CDROM, Internal mSATA connection, Infra Red Remote, Dedicated app (internal testing stage), and cheaper
Cayin may be better in term of USB Dac support, SQ (have no heard the sound of S5), Software (I have a very bad experience with the Aune S1)
Hope Cayin can quickly rectify the remaining issues that previously reported, and add additional features as much as possible