Theis or Kenrich?

I see/hope theis is more than an emergency third string center. If we play 2 bigger players consistently, we have 3 guys who can play and are versatile in either the 4 or 5. Theis, ihart, and Chet. Still want to see us trade for John Collins. He would give us a very good 4 big man rotation. We prob won’t do it though