I think these guys have the best handle on it. John Hansen and Adam Caplan run it and they have Greg Cosell breaking down video. I think these guys have the most informed opinions.
I started listening to their radio show on Sirius XM last season and I think that's why I won my league. I probably used 3 or 4 services last year, but I've decided that this is going to be the one and only service I use this year.
If you decide to go with a pay service, then this is absolutely the way to go.