What is the Best data source out there for trading futures? I have heard that Ninja has service that costs an extra $.25 per

contract that is somewhat special.

Opinions and comments appreciated.

In my opinion the best datafeed is IQfeed.
They have also an API where you can code against and the datafeed is very fast, reliable and efficient.
The IQfeed datafeed is broker independant.
The only little negative element, is that their client is Windows only (you can run it on wine under linux).