I think it's almost a certainty that Shelton falls to Miami and continues falling. The 40 is overrated, but teams do use it as a cutoff, and in recent seasons, the slowest 40 for a DT taken in the 1st round was Michael Brocker's 5.36. Shelton, of course, ran a 5.64. Of course, the immediate reaction will be, 'Well, he's a NT, so you don't care how fast he runs.' It's true that if you're drafting a guy to just clog things up, you don't care how fast he runs (to some extent), but you don't draft those guys in the 1st round. The 40 time indicates that Shelton is too slow to impact the passing game, and any 1st round pick should do that. I like the idea of looking for a pass rusher or a DT in the 1st, because the talent is good at those positions. I'd prefer Carl Davis or Malcom Brown to Shelton, but I'd favor Davis. I have Goldman as more of a late 1st, but I'd also favor him to Shelton.
As a prospect, I'd say Carl Davis is like Michael Brockers with Ra'Shede Hageman's physical tools. On passing sets, I don't see teams doubling Shelton consistently - playing next to Suh - and I don't see Shelton as having the physical tools to make teams pay for blocking him 1-on-1. I don't think teams would/could do the same thing with Carl Davis. He'd presents a quandary for opposing teams, and I think he and Suh would make for the most dominant DT combo in the NFL by Davis' 2nd season.