There are lower priced solutions.
Sizevise the Nikon F3 is about half the size of your F5 as is the FM line and you can use your current lenses.
If you want a RF (besides your XA) you could go for a Canon QL 17 or if you really want a system camera a Bessa R XX You can even find a R2 A or M used for little money these days but a new one is still cheaper than a used Leica.
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