After buying our house, we asked the builder where we should buy paint. They recommended Seattle Paint Supply because that is where most contractors around town buy theirs. Home Depot/Lowes is extremely frowned upon because their products just don't last over time. This also applies for deck sealers, etc. Another perk is that the staff there really know about paint, and will help you select the products/supplies that are just right for you. There are many Seattle Paint Supply locations all over town, so I'm sure there is one in your area!