T-Shirt Print Companies

[Maple Leaf]

Was wondering if someone knows good places to print custom designs on t-shirts.
Where can you find quality t-shirts and how many should I print to make the price reasonable?
Did anyone try online companies? Or should I try to find something local in Toronto to make sure I see the t-shirts before I print in bulk?
I am just starting my rereplacement and was looking for some leads Thanks!