El Mirador has been mention many times, it's a very nice restaurant with good food in the downtown area
http://www.elmiradorrestaurant.com
Rosario's is nothing special, very noisy & slow service go to El Mirador are another place.
Karam's just closed about 6 months ago for a Walgreen's to be built.
Tomatillo's I suggested it on your thread where to eat the day you arrive if you are by the HEB central market it's not directly in the downtown area
Casbeers is OK, but the Mexican food isn't good Mexican it very different not for my taste I believe that Octoboy describe it as a trucker type also has been mention many times on the website & it's in the King William Historic District
Citrus is a stylish restaurant at the Valencia Hotel serving Breakfast, Lunch, Dinner it's OK
Las Ramblas at the Hotel Contessa is a spanish style cuisine & has a bar call Cork it's OK