Hello Bill,
I've got a set like this:
https://www.theloupestore.co.uk/Tech...ional-Set.html
Pretty decent for the money, although not illuminated.
I'm fairly fussy about optics, having made cameras for 25 years in my previous life. I saw a loupe at Salon QP a couple of years back that was very impressive, but came with a price tag to match. From memory, c. $500.. depends how much you want to spend..
Cheers,
Plug