If you are advertising spending $100k there is a good chance there are a few dealers or other high end industry affiliated folks around here licking their chops and offering “unbiased” advice. So be aware of that.
Also the people advising to not change anything until you know what you have in a new house and room are absolutely correct. You can’t know how anything will in fact sound there until you are there and listening. Anything is possible including ending up with your dream system for a lot less. Make one change at a time and the room and it’s acoustics will likely be a big one up front that does not change again.
I am also older and approaching retirement. I want the best sound and a system that is physically manageable. That means smaller and simpler is better. That’s just me but worth considering. Would you really want to deal with a large heavy bulky and hard to manipulate bunch of gear at this point that $100k could easily buy? Good things can come in smaller packages. Just something to consider perhaps.