I prefer McShay between the two "draft gurus" at ESPN, but I do like Kiper, as I enjoy when he verbally abuses McShay in a draft duel. It's kind of cool how he talks so fast too hahah. Out of the draft experts, I probably like Mayock the best but I'm not blown away by any of them.
One guy who I think is undervalued/under-used is Merril Hodge. I always love hearing what he has to say after watching tape, and I tend to agree with him on a lot of his views. He's usually right about a lot of things and he breaks down film very well. For example, the 06 draft, Hodge said he wouldn't trade up to #2 for any QB and wouldn't even draft any of the QB's in the first round except for Cutler. He was ridiculed at the time, but 4 years later it was a great call.
He also went out there and said Mendenhall is and will be a much better RB than McFadden in the NFL, and he rated him the best RB of the 08 draft. I felt the same exact way and was kind of hoping the Pats would figure out a way to get Mendenhall since I loved him so much. So far, Mendenhall has been more productive than McFadden and looks to have a brighter future in front of him.