Well, here's the websites of the places mentioned:
Leelawadee
Nathong
Another great place nearby:
Som Boon Seafood
And there's Seasons Change, I can't remember the website, but it's in (I think Ratchada Soi 21), opposite Poseidon. Really nice place, opposite a suki joint. The food is great and the ambience is very nice as well.