It's been talked about in length in other threads throughout the winter. Well the guys at pointofpittsburgh who have modeled the surplus value of prospects the last couple of years have worked with Fangraphs and updated their model on the FV of players and not simply where they rank on a top 100 list.
I like this idea better because a as we've seen a 50 FV player can be ranked in the bottom 4th of a top 100 list or not at all.
Yet the real difference between 75 and 125 is really small.
http://www.fangraphs.com/blogs/valui...100-prospects/
Prospects all the way down to 45 FV have value. For a team like the Braves who go 18 deep with at least a 45 FV that is super deep.