I'll take Ejim and not think twice about it. Ejim had a poor game last season because he fouled out and only played 13 minutes against Iowa. Hell... If Percy Gibson matched up with White and had 14 points, 7 boards, and 3 blocks last year in 24 minutes then that speaks volumes. Percy Gibson has played 22 minutes so far this season with 4 total points and that includes not even seeing the floor against Michigan or BYU. Percy Gibson most likely won't see a minute of playing time against Iowa.
Actually, I think this will be a game that Percy plays in. First Iowa's very tall, but not super athletic (despite what they try to tell you). Percy will need to play against them, because we will need his big body in this one.