I haven't seen Tennessee in a while, not since they beat Xavier on the road, and I wasn't greatly impressed. I think they'll lose tonight, because they seem to struggle on the road.
If Memphis wins tonight, I think they're the best team in the nation... it obviously doesn't mean they'll win a NC, but they've had a tough non-conference schedule.
After that, I'd say Kansas because they are the only team without a 'bad' loss, UCLA after that, then it gets hard between Duke, UNC, and Texas.
Bracketology has Kansas in the Phoenix regional with... drumroll.... UCLA as the #2 seed.
If it happens, it would be 3 years in a row UCLA got the #2 seed in the West.