I get almost all of my produce from Iovine Brothers, and their selection is what always draws me back. On Saturdays, the place is absolutely ghastly crowded--you can hardly move two feet sometimes--but if you get there in the early afternoon, the quality of the stuff is higher, I've found, because the turnover is higher then so everything is fresher. If you get there on a Monday afternoon, things are a little bit bleaker because there's not as much traffic, but I can't say that I've ever left disappointed.
You'll find all of your staples (oranges, bananas, apples, potatoes, onions, lettuce, carrots, mushrooms, etc), but they also have an ever-changing selection of more exotic fruits and veg and mushrooms. They have some organic stock, and they also carry nuts and dried fruit.
They've changed the place around a bit, so the aisles are wider and more accomodating, and the whole place feels a little less confined.
If you're looking for produce at amazing prices, this is the place to go (seriously--I get so, so much food for so little money, and I'm almost never disappointed with what I've bought).