Lotus of Siam
Our usual favorites:
Tom Kah Kai - Bangkok style (chicken, coconut milk, lemongrass soup)
Nua Sao Renu (grilled beef with tamarind sauce)
Crispy Duck Panang
In our experience, their 1-10 hot scale is um, a bit hotter than other Thai restaurants. A "3" anywhere else would be a 1 or 2 there. YMMV.