Chameleon looks nice, but out of my budget. I almost bought the 3.1. Glad I passed! Decided to go a modular route that will hopefully allow me to audition multiple DACs at minimal cost. Just today I took delivery of an iPower and a Raspberry Pi. I'm still waiting for my Allo Kali to arrive from Canada. With this trio, I believe I will have a first-class I2S signal that will bring high performance from different DAC hat boards. I'm going to start with matt_garman's TDA1387 design.