nah. swiss air to jfk. newark is a hassle to take the train, especially if you don't know nyc and you have a good amount of baggage. plus continental really isn't so great, i only take it when the price is outrageously better than all the other airlines.
from jfk just take the airtrain or even better pay about 20 bucks and take a car service to your hotel, you can even check if your hotel has a shuttle to save you the hassle.
advice- always jfk over newark if you are heading into manhattan, then you even get to see beautiful brooklyn

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