It's Kalil for me. I like Rodger Saffold, but Kalil is one of the best left tackle prospects to come out in a long time. Yes, Blackmon has had Terrell Owens (talent-wise, not personality-wise) comparisons. Yes, Claiborne is said to be a better shutdown cornerback than Patrick Peterson was coming out of college. Yes, Richardson is one of the very few running backs who would be worth a number two pick. And I must be the only person who thinks that RG3 is going to be a better quarterback than Luck.
Still, I don't see much difference between Claiborne and Kirkpatrick, and it's a very good possibility that we'll get Finnegan in free agency. I can't justify taking a running back in the first round when we already have a Hall-of-Fame-caliber back in Steven Jackson. As good as Blackmon is, he's most certainly not at the level of the other elite receivers that have come out - and with all of the fantastic prospects available in the second and third rounds, I don't think I could justify taking Blackmon when there are pressing needs that can't be filled in later rounds. And Sam Bradford is the quarterback of today and the future. Taking RG3 would be a waste of a pick.
But Kalil is easily the best left tackle on the board. I don't care what Mayock says about Reiff; I've seen both of them play, and there shouldn't even be a comparison.