Athens bakery serves up some of the best phyllo pastries in Toronto. Their Galaktoboureko (custard phyllo pastry) is the best I have had in Toronto, and this square shaped piece of heaven has had me coming back to the Danforth since I was old enough to ride the subway on my own!
Their loukomades (honey balls), are also quite good and cheap and I have heard great things about their spanakopita.
Whether it's the fact that they're open a little later than everyone else, that they only do a few pastries (but do it damn well), or that they've kept a clean reasonably priced cafe over the years, Athens is awesome; check it out.