In New York I believe the best pasta with clam sauce involves several stops

• Any of the farmers markets when the fisherman is there, and clams are in season. Ask them when they will have clams
• Olive Oil and company in Grand Central or some of the other great places in the city for olive oil
• fresh garlic from the farmers market when you are buying the clams
• fresh oregano from the farmers market
• Your favorite pasta

It's pretty much impossible to beat fresh stuff you make at home assuming you have fresh clams picked the day before or the morning you buy them