Pad Thai Ekkamai makes one of the better plates of Pad Thai in Bangkok. Standard is 45 bath, while the river prawns version will set you back 150 bath. It is delicious and obviously something very different from the usual 4 small shrimps you get most places. It comes with their homemade chili, garlic and lime sauce, something you normally don't get most places. See full review at StreetsideBangkok.