See the thing is that Stalkers are just strong attack wise, and reasonably hard to take down because of how cheap they are and how many hits they take, they would rock a Medivac right away, because you can blink 20 Stalkers right under it. I never had a problem with Marauders although they cost about the same and are a little weaker than the Stalker, and slowing something down that has range doesn't really effect it that much.

