In the world of Mongolian BBQ near my work, there are 2 contenders:  Stir Fry Paradise and AJ's Mongolian (formerly and possibly partially still YC's...).  I prefer Stir Fry Paradise because it has never been incredibly packed, and their meat resembles meat and not frozen tubes of meat shavings.  The small "bonus" buffet offers more food if you aren't crippled by all the food you crammed into your bowl.  I like the cream cheese wonton triangles, they rock the body that rocks the party.  

Yeah, they are a little pricier if you tack on a soda.  Just drink  water and then tweet to the world how progressive and off the grid you are by not being a "soda drinker".  I haven't quite gotten my "sauce mix" down yet, but that will come in time.  That's the beauty of these places, if your food is bland then the only person you have to blame is yourself and your lack of sauce mixing artistry.