I second that choice. Chez Dominique is as good as or better than most two-star places around Europe. It is pricey, but worth it. Of the other Michelin-starred places, Sundmans is good, but I find George overpriced and their quality not that great.

Demo, recommended earlier, is a reliable choice and quite reasonable compared to CD.

Serata (in the corner of Bulevardi and Albertinkatu, near Villa Thai) has some good Italian food at pretty reasonable prices.

The French place out in the country mentioned earlier is called Arsené Flipo. It certainly is a curiosity, but the food is IMHO pretty mediocre -- you can find better in just about any neighborhood bistro in Paris.

If you are looking for simple, traditional and well-prepared fish, try Salve or Konstan Möljä, near Hietalahdentori. Especially their lunches are a good deal around 8 euros. No gourmet and no frills, but good fish.

For a traditional Finnish buffer lunch with a great view almost all the way to Tallinn (on a clear day), try Haikaranpesä (The Stork's Nest) in the Haukilahti water tower, about 15 minutes west of the city.

Cheers,
T.