The casual and cute Tuu Gub Kao could well be the ideal neighborhood Thai restaurant.
It serves up classic Thai dishes with no MSG like guay tiew nuea sub (fried noodles with minced Ko Khun beef, B150) and moo kluk foon (Northeastern-style deep-fried pork, B100) just made to go with cold beers like Singha (B95), Heineken (B150) and Asahi (B95).
They also do delivery (free to anywhere on soi 39). At the end of this month, they'll be joining with Chefsxp and Food Panda so you can order online.