El Baqueano, Buenos Aires
This has become my favorite restaurant in Buenos Aires. I just had my third meal there in the past year (4th, overall), and it is nothing short of a wonderful dining experience. With the overall parrilla quality dropping faster than you can blink, options for high quality dining are limited.
For those who may be timid about the various animals served at this establishment, please don't be. The portions are small, and you wouldn't know it was llama, or pacu, or whatever it is, if they didn't tell you. And after all the courses, you are full, but not stuffed. The wine list is eclectic and a breath of fresh air for this city. The service is impeccable, and very friendly - another breath of fresh air. (This city, despite being named after good air, needs a lot more fresh air when it comes to service.)
AR$250 per person? A bargain. 10% off if you pay in cash.
I don't always love all the courses, but I am always pleased with my overall dining experience.