One of my favorite cuisine is Thai. The Thai cooks gathered the best recopies from India and China and developed their own cuisine. There are several places in Helsinki where to enjoy the Thai food. The fanciest place in Helsinki is Villa Thai, Bulevardi 28,
Well equipped the restaurant has an exotic Asian look. Its a fine dinning place with high level service and dedicated pricing ( €60-100/dinner/person).
Good value on your money you can get from restaurant Tamarin, Iso Robertinkatu 18, which is located few min walk from Kamppi shopping center. The restaurant is offering lunches and dinners.
Lunch buffet including soup, several meat meals and vegetarian option is costing only €8.50, which is relatively low comparing with other good quality places. Service is also good: polite and taking care. The official lunch hours are 11-14:00, however you can stay there till 3 pm.
The average dinner will cost €25-50, depending on the choose of the meals and number of drinks ;)
Bon appetit!