National Title game (win) all the way.
Conferences can come and go ::cough Big East cough:: and theres no guarantee the sweet flow of money will continue for the P5 members. Look at how fast ESPN is losing money after overpaying for TV rights in the era of cord cutters. Wouldn't be surprised if only a few big name teams got paydays down the road instead of conferences as a whole. Besides look how well that P5 deals gone for Rutgers.
Stadiums collect dust half the year and we can get one eventually. (Besides I like my current seats)
But national champs... you'll always have a title.