I think the draft stats are great for being able to see who is under or over valued and where you might be able to wait a round or two on someone. IMO, individual mocks are not as reliable as a good set of draft stats.
Last year, iirc, ESPN and someone else (CBS? mockdraft.com?) had stats available for free, but I'm not sure if any of them will this year. I've been looking without any luck so far, so I'll let you know if I find something if you do the same.