in all reality
none, as they are published before the Combine and Pro Day workouts, so someone like Jason Hill, they talk about his lack of speed, even though he ran a 4.36, so he obviously isn't slow, and since they publish them before the Combine and Pro Days, if an unknown has great workouts then and becomes a sleeper, they usually aren't mentioned in the rags, so on Draft Day, when you're flipping throug the mag, and someone like Paul McQuistan, or Jason Hatcher, goes in the 2nd and 3rd rounds, you say "who? they weren't in the mag"
but w/ saying that, I like TSN's Draft Guide, nice formatting, making everything clear and conchise, plus it's the one I've always gone w/ since I can remember