Oklahoma. Trying to think of a reason that hasn't already been stated. I'm old - for me, as a little kid, I remember the disappointment of Karl Kremser missing a game winning field goal in the '68 orange bowl.
For all you kiddies out there, it used to be very special to make it to a bowl. You could count them the number on your hands.
OU was beating the crap out of UT and UT made a comeback with a couple of interceptions. Karl Kremser shanked a 43 yarder with little time left. Lined up right down the middle. Soccer style (that used to be a big deal too, not many - now they all are).
Revenge. Plus what everyone else has said. OOC opponents bring a fan base that doesn't have a clue what they are stepping into. Someone mentioned CAL in '06. Perfect example.
Kickoff time is perfect - Assuming it's a sunny day, still early enough so that the temps will be upper 80s - low 90s during the day and drop off into the 70s around kick. Fans will be on fire for the home opener. Probably a checkerboard in the stadium (thank you OU, we borrowed that from you). It'll be the first time the team doing the Maxim's will be piped up on the jumbotron - a little history there (I was there the first time they ran through the T, so don't mess with me!). Also, teams are close in talent. Should go down to the wire. It'll set the tone for the Florida game.
Or you could come watch Mark Richt later.