I listened to some of the preseason games last year on SIRIUS and it was great listening to the Dallas announcers, you get so much more tidbits while listening to them, they talk about things from training camp that you may not have known, quicker injury updates, etc.
This year I'm going to try and sync the Dallas team radio broadcast while I watch the game on TV to account for the radio delay (thank you GOD for TIVO!
) that should be great, especially when Theisman or any of the many other Cowboy haters cover a game on the TV broadcast team.