Have a couple of pairs of Smiths with the polarchromic lenses (the tint changes to match brightness of day). They are definitely better than the cheapies that I used to have, but no idea how to compare with Mauis, Costas, etc. The Costa 580G lenses are pretty famous for being amazing.
Two notes that may help:
- bigger is better.....make sure they're big enough to properly cover your eyes/face
- bronze/copper is good all around on ontario lakes, but the saltwater guys (on clear water) almost always have greens, I think. May be worth looking into that.