We had a fabulous meal at Osaka in Palermo--Japanese/Peruvian fusion. If you eat fish, this is an excellent spot. The music wasn't great, but the food was unusual and very tasty. The fish,the sauces and the rice were all flavored with interesting spices, and the presentation was delightful.
As for price--I find little difference between the price of a mediocre meal and a great one in Argentina. This is a great one and well worth it.