McShay is really hit or miss. Sometimes he'll say something that makes you go ?!?, but he's getting better. Kiper, while still very good, is starting to slip a bit. I will forever give McShay props for saying that Brady Quinn was only considered an elite player because the draft class last year was not very top heavy, and almost every other year, he'd go mid to late 1st. Not cause I necessarily agree with him, but he called where Quinn would be picked.
Personally, I think Mike Mayock is the best out there right now. He and Adam Scheffter do a great job as insider and draft expert for NFLN. In fact, NFLN has a lot more people who are qualified to talk about the draft than ESPN (though I do watch the ESPN draft a little more due to the camera angles being so much better)