50%
If he wants faith and hoops, we lead.
If he wants just Big Stage hoops then it's Duke Kentucky
If he wants a great coach then it's BYU, Michigan State, or Kansas (Coach K, Pitino, and Calipari are great recruiters and mediocre coaches.(also why Cal and Pitino were terrible NBA coaches).. which is why their players tend not to improve in college (at least the ones that stay around that long... for instances Jones at Kentucky did not improve as a soph, but the talent around him did))
Again though, if he wants to mix faith with hoops, then I think BYU offers everything he wants except the consistently Big Stage (not much we can do for Saint Mary's high school gym, etc.).
Some players don't always want the big stage, and there's ZERO PROOF that the big stage always helps your professional resume'. Look at Jared Sullinger; a guy that got his team deep in the dance but is now slipping in mock drafts because his weaknesses were as apparent as his strengths.
I don't love our chances, but if you consider what he gives up by going to BYU, he gains much more that he couldn't get elsewhere. I have a feeling he knows this, and ultimately he'll have to send the message about what drives him to the school of his choice. I'm not saying that by picking Kentucky over BYU, he's saying he doesn't care about his faith. I'm saying that ultimately, his feelinngs about what BYU offers him and his faith might still not be enough to pass up the Big Stage. In his case, picking Duke, Kansas, or Kentucky means he'll be in a big stage week in and week out and usually win, and like Manti Teo and others, maybe he thinks that his faith isn't affected, regardless of his college destination... and maybe like Teo, he'll find out he was wrong.
Picking the big stage hasn't worked out for all upper tier LDS athletes. For example, Teo has played on TERRIBLE Notre Dame teams that haven't done much (in spite of all their draft picks this year) but he got the spotlight he wanted. Hope it was worth giving up what BYU offers... I doubt it was.