Thai food is excellent in general. Sa Bai Thong is a friendly management, starting out with the Univ. Ave location, and quickly expanding to another location at Odana Rd.
Their Roast Duck Curry is to die for, although the portion is somewhat little when you are sharing 2 other dishes with 3 other people. (We usually eat family-style so that we have the option of sampling many many dishes at one go... =) )
The tom yum soup and a 'dryer' version of it : tom yum talay hung, is chockful of flavor, and ooh, so satisfying.
For dessert, try the sticky rice with mango, although depending on the season, sometimes it is not available.