The reason I purchased Katana is my HTR is limited to 32/192. Could only get DOP from disks working.
Had isolator but limits bit/sample rate. It does allow you to use a budget PS to run it and Pi, while improving sound quality. So a good trade off in beginning or as budget allows. Definately worth getting a upgraded PS for DAC and MC as budget, your equipment and ur ears allow.
I decided to improve power supplys minimizing need for isolator. Will add isolator v1.2 back in a month or so. Using iPower to power Pi. Then a chinese LPS for Micro Controller and DAC. It contains independent PS.
Great product @Allo, great for the ability to change and tweak the platform.
Personally I like to see 32/384, DSD64 and DSD128 but thats the nerd in me.