Thanks to everyone for the comments and feedback - many people seem to be curious about "why did I go all in".
The honest answer is that I'm old. My wife pointed out that if I was ever going to do build a system and enjoy it - I should do it now. It's not like this is my first system and there will be many after it.
Someone also inquired about my phonograph plans. I truly have no idea. I'm somewhat overwhelmed by the multiplicity of combinations of drive/platter/tonearm/cartridge so I decided to punt on making the decision and begin listening to streaming while I research the various options