m2
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Sleeper brands/models that offer a lot of bang for buck?
A few years ago older Roger Dubois, Daniel Roth, and Parmigiani Fleurier offered immense value for the dollar. The LUC Chopard's were dirt cheap too for something with a Geneva Seal. 
Something like the Ionica was crazy cheap...and still sort of it, just harder to find.
What are brands like that now?
I just started looking at some of the Franck Muller skeletons, and noticed they are very, very well finished. The aesthetic isn't my thing though.