Baseball Prospectus released their list of the Top 11 Red Sox prospects, with an additional 4 noted after that, for a total of the Top 15.

Link

Five-Star Prospects
1. Ryan Westmoreland, CF
2. Casey Kelly RHP/SS
Four-Star Prospects
3. Josh Reddick, OF
4. Ryan Kalish, OF
Three-Star Prospects
5. Anthony Rizzo, 1B
6. Jose Iglesias, SS
7. Junichi Tazawa, RHP
8. Michael Bowden, RHP
9. Lars Anderson, 1B
10. Reymond Fuentes, CF
11. Derrik Gibson, 2B/SS

And

Four More:
12. David Renfroe, RHP/SS: Like Kelly, he's another big-bonus, two-way star, but Renfroe will begin his career as an infielder, and he projects as a prototypical third baseman due to his size, power potential, and arm.
13. Alex Wilson, RHP: He had a 0.50 ERA in New York-Penn League while giving up just 10 hits in 36 innings, but he's already 23, so he should dominate. Still, his fastball/slider combo is impressive.
14. Stolmy Pimentel, RHP: The young Dominican righty still has plus command and plenty of projection, but performances have been so-so.
15. Che-Hsuan Lin, LF: Lin’s tools still impress, his defense remains outstanding, his numbers... not so much, but Red Sox officials remain very high on him.

If you have a subscription to BP you can read details on all the top picks, but if not all you can read is the Westmoreland detail, where Goldstein says

Perfect World Projection: Westmoreland could be the kind of player people thought Grady Sizemore would become.

I don't have a subscription but I've read that Goldstein called Kelly's ceiling as a #2 starter and an "occasional all-star", not really an ace ceiling at this point.

Baseball America's list should be out in mid-December.