Typically I start from professionally reviewed and rated components: Stereophile or The Absolute sound. Particularly when you are looking at expensive equipment. These reviewers generally have heard the very best and lessor units so they can place it in the context of sound type and price. They also use standard high end audio terminology. Unless someone on the forum takes the time to present his experience, biases and associated equipment you are very unlikely to get really useful input like that here. As additional info, when you already know a lot, or for general guidance this forum is great.
There are no professional reviews I could find in these units. To me that is a huge red flag. Seldom does the technology used make a huge difference except in budget equipment… in high end equipment it is all about implementation and the blend of components and overall design.