Be sure to head over to SB Nation's www.minorleagueball.com site run by John Sickels. Last night he posted his top 20 Angels prospects, and is working on the San Francisco Giants next.
Here is what he said about the top rated prospects in the Angels system:
The Angels have more interesting prospects than I expected when I first began this. I really like Trout, who has the highest upside of the three B+s, with the most star potential if it all comes together. Conger and Reckling are closer to the majors, of course, and you can make the case to rank them ahead as a result.
He lists each prospect with a couple sentences about each.