What Is The Best Site To Start A Fantasy Football League That You Can Set The Scoring Exactly How You Want It?

I am looking to set up a league (almost like the one on NFL.com but it is to expensive) where we can set up exactly the number of players we want to start and backups and the scoring exactly how we want. Oh, and also with real time updates when the season starts. Does anyone know of a site that will do this for cheaper then NFL.com?