Seared fish tacos; what types of fish? (cheap-ish)?

I'm going to my farmers market for some fresh fish, but they don't have a wide selection as a whole fish market. Maybe about 1-1.5 dozen different fish. I'm making a spice mix for my tacos and searing so I'll near a fish that's common enough I should find, but also somewhat cheap (No... show more I'm going to my farmers market for some fresh fish, but they don't have a wide selection as a whole fish market. Maybe about 1-1.5 dozen different fish.

I'm making a spice mix for my tacos and searing so I'll near a fish that's common enough I should find, but also somewhat cheap (No swordfish). I can also filet my own fish, so size isn't that big a deal.

Should I go for mackerel, snappers, basses (moderate activity fish), or go for flat fish? What about Halibut?

Bonus: Is it likely that flat fish are served seared, or should they preferably broiled due to low fat content.
Update: I'm making a mango salsa to top, if that helps
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