I dined at Antico Arco a couple of weeks ago. For serious foodies looking for a modern, sophisticated take on Roman cuisine this is a fantastic place to visit. I highly recommend it. Everything was perfectly cooked, beautifully presented. Highlights included the Castelmagno risotto in a Nebbiolo sauce, Mancini small macaroni with amatriciana sauce, a rustic style veal chop, but all was great. This place is on the expensive side but well worth it for what they do. The atmosphere is upscale yet casual... I think the photos on their web site look more formal and somewhat intimidating than the place actually is. Serious Italian wine list as well. The staff did fine with our speaking English. If I lived in Roma this would be a regular haunt. Also, I like the mainl level dining rooms rather than the one that's upstairs.