Astro has the best coffee in town, and arguably the best baked goods, too. I don't know that it's any more expensive than any other coffee shops, but if it is, you're paying for insane quality.

It is a higher echelon place, but the people there are really friendly and inviting.

Le Petit Zinc in Corktown might also have wifi. That's a wonderful little spot with decent coffee.

If you're looking for somewhere in Midtown, I'd suggest Avalon or 14 East in the Park Shelton.