@russbutton, you have a pretty decent analog rig. If you are happy with your digital setup, then no one can argue that. When you compare various digital devices in your system and conclude none are better than what you have, then that should be qualified with the statement, in your system.
Bits is bits is a greatly oversimplified viewpoint for digital audio. Most of the posters on these forums have found digital audio to be a much more complex and sometimes bewildering hobby. It's better to keep an open mind but still be somewhat skeptical when someone is trying to sell you something. Meanwhile, many of us are hobbyists eager to share our knowledge.
As for the depreciation of expensive audio gear- pick your poison. Expensive cars depreciate 15% per year on average- well, so do cheap cars. Expensive wine is worth nothing once you drink it. High end audio gear tends to hold its value after its initial depreciation. If you are focused only on cost then great sound will continue to elude you.

