I think I'd have a custom titanium gravel/touring/adventure bike from Tom Sturdy, with some nice anodised parts, and a Rohloff hub.
I'd probably do something similar to this or the Holdsworth Helm from Planet X, either bike fitted with SRAM Rival AXS as a little treat to myself. Anything more valuable and I'd be too worried about damage, having it stolen or the cost of maintenance replacing components like for like.I'm not too fussed about Van Nic's top of the range bikes. I would be more then happy with their humble 105 equipped Ventus (I have the rim braked Ventus as is). Though I would swap out the Shimano crankset for a silver Spa one.
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Where do you hang pannier bags?, it's not practical, is it.
Just 'bling'
You have 'other bikes' for doing that. Simple.