Just to digress - I really dislike nicknames like MoPo and RoKo.
The manager's name is Koeman. What's wrong with using his real name? That's only two more letters to type!
As far as the original point goes, I would favour getting in another striker - if a decent one becomes available. What could ruin our current hot form is two or three injuries to key individuals: Pelle, Tadic, Fonte or Alderweireld, for example. I think defence and midfield are covered. Another striker would be good.