As was said earlier, every candidate has some downsides. For Lane, USC was a long time ago, but I haven't seen enough of him as a HC since to think he'd be a home run. Not sure of the circumstances, but his second season at FAU was a losing one. He rebounded with a 10 win season then bolted for Ole Miss.
His record at Ole Miss has been good, but I'm not sure he's had a signature win there.
If we're going to roll the dice, I'd much rather land on Deion than pay Kiffin a 9 figure contract. There are coaches out there that justify that price but Kiffin is not one of them.