Napier will almost certainly go undrafted if he goes pro. Once you go down late in the draft, you are looking for one of two things: either project-ability, or one elite level talent. Think of guys like John Jenkins last year who made the league solely off of his shooting prowess. Napier doesn't have the speed, he isn't an elite level shooter, and he isn't an elite defender. He's literally average to below average in every category for an NBA player. With that being said, those kind of guys really fit the European mold perfectly. We all know Marcus Smart and MCW are better, but there are also some more intriguing late rd players than Bazz - Nate Wolters has the size, albeit not the speed, and is an elite level shooter and scorer, albeit very untested. Isiaiah Cannon is another example of a guy at a small school who compares very similarly to Napier.
On the counter-side, while Napier is a much better player than Boatright, I actually like Boatright's shot of being drafted better than Napier's. Some team could look at his breakneck speed and see a potential Ty Lawson if he grew into it. I think its a huge stretch, but NBA team's don't invest much when they take 2nd rounders, and Boatright's UPSIDE is higher even if his floor is much, much lower.
Overall, though, I do think Chris Smith has an interesting point. Unless Napier has reason to believe he can improve his stock (improve his D, improve his speed, advance to a 45% 3 pt shooter), maybe he should just go pro and head to Europe. He really does fit the mold of a 25 ppg scorer over there down the road.