If that's true, he'd be first on my list. That kid is as talented as anyone I've seen coming through for a number of years. I think a lot of people are judging based on that loan spell he had last season, but it would be hard to shine in that side given they were, statistically, the 7th worst in the history of the Premier League.
If you watch his Scotland performances or his Chelsea ones you're left with a very different impression of the player and if you're genuinely talking under £15m, then it's an utter no-brainer (to my eyes anyway)