I am on the fence. On the one hand, he has had some success in US 5000 champion races and struggled in his one attempt at the 10000 (although a 27:56 in literally the only attempt isn't THAT bad, I believe he crashed pretty hard and fell off pace pretty badly).
On the other hand, I believe he paced Bairu on his qualifier attempt in the marathon and came through the half marathon in 65 or so before continuing on for a a few miles, and it wasn't a race effort for him, I don't think (I'm going off memory from word on the street; I don't have insider information). Also, the only more talented US marathoners at this point, in my opinion, are Meb, Hall (who might be done, pending this weekend's race), and Ritz (who is also old and maybe on the downward trajectory).
I had pictured Derrick as the next top US marathoner, and he might be, but I suppose there is room for more than one at the top. Meb will slow down eventually, Hall might be done, and Ritz is a wild card going forward. In 2016, and certainly 2020, if Bumbalough shows some aptitude, it could be him and Derrick at the top.
I don't mean any disrespect to some of the other current solid marathoners, like Eggleston, but Meb, Hall, Ritz, Derrick, Bumbi have a distance pedigree dating back to middle school that the others simply do not. So naturally Bumbi's potential, and Derrick's, has to be considered higher until proven otherwise.
I say 62-64. It is a first attempt, after all. I think his best bet might be to move to the 10000, though. At the 5000, it looks like Rupp is there to stay at least through 5000. Hill appears to be made for at least US championship 5000s. He and Jager are a toss up IMO at that distance. Lomong has his number (better kick and equal or greater strength). True might have his number for now. It's just too competitive. He's good, but his odds at the 5000, IMO, will never be better than 50/50 to make a team going forward. It's just too deep. And if Cheserek gets citizenship? Oomph. He might beat Rupp in 2016. Seriously. Unless Rupp runs 13 flat, which he won't.
In the 10,000, it's Rupp, who he won't beat, Derrick, who he could (could, not would) beat in a championship race, True, who has had his number the last year, but did not before and might not going forward, and...that's it.
After writing all that, it sure seems like he should be working toward the 10,000 or the marathon. Early on, it seemed like he was more speed oriented, but I think that's just because he focused on the 1500 in college. His PR is only 3:37 in the 1500. 7:37 in the 3000 is quite a bit better than that, as is 13:12 in the 5000.