Honestly try the Pad Thai first then after you've gotten it out of your system try some of the other stuff. The mint chicken is awesome,
Soup: Tom Yum Goong(shrimp) (this can get extra spicy because its also has lemon juice in it)
Appetizers: Mee Krob (crispy noodles, sweet/sour), of course Satay (bbq chicken skewers).
Entres: Ground Mint Chicken, Panang Curry, Pad see-ew
Watch out of course with the spicy levels.
Oh and when its in season, you have to get the mango and sticky rice with coconut milk.
DO NOT TRY THE DURIAN.
Some of the best thai food is in Los Angeles.