Komen's 3k record is the best, here is why:
Neither El Gerrouj nor Bekele could break it. I believe El G tried at least twice. I know Bekele tried at least once, but I believe that it was such a stellar record, he didn't want to risk failing too many times. It's almost incredulous to say that Bekele wasn't good enough to hang on at Komen's murderous pace, but I believe that Komen's 1500 ability put him out of reach of Bekele. The 2 mile record might go down any time, I believe, but I think the 3k record will be around for a while yet...