Here's one scouting app that might be useful. Look for others as well.
http://www.chiefdelphi.com/media/papers/3098
Also, "gut" comes into play for pick lists no matter the scouting system. The arguments at our draft sessions are epic and famous on our team. We're all passionate and have great observations (just mine are better...
). Our final draft list may look little like our initial list, but we had a good starting point that we trust.