My favourite Thai restaurant outside of downtown since I came back from Thailand. Bow Thai has fantastic delivery and a quiet, classy dining room experience. Their delivery is great value and if you order directly (instead of going through online), you'll find that they'll offer free spring rolls for an order above $25, or Pad Thai above $40. The portions are massive (especially the Pad Thai, which shouldn't be eaten by a single person).
The dining room is a little small, but the area won't have a lot of diners so you'll likely get a seat. Great service because they won't sit more than 20 or so people. Food is even better in-restaurant with attention paid to presentation. I've had many of their curries and love their Cashew Nut Chicken and Me-Goring.
Definitely come here if you're in North York, of if you're passing by Leslie on the 401.