Plastic Persol 2916S tortoise + brown crystal polarized lens - imo look great, outstnding optics.
Also a pair of black Maui Jim Navigators (name on temples rubbed off) - but these are reflective so not top choice for a suit. Unfortunately, the polarizing coating is disintegrating around the edges of the glass, so I am not too keen on MJ right now, even though the optical quality is still great.
Would wear Serengeti forget model (Stratus or Altus) CPG lens w/ Ti frame. I think it works w/ a suit.
I have had several Oakleys and they cannot compare in either optical or build quality to Persol and MJ. Except e-wires or similar, I wouldn't wear Oakleys w/ a suit. I wouldn't buy Oakleys now anyway.