Who should play Abe, Rosita and Porter?

First of all, is you haven't read the blog by LuckyMatt (http://walkingdead.wikia.com/wiki/User_blog:LuckyMatt/Abraham,_Eugene,_and_Rosita_have_been_cast_for_4.10) go do that now. 

So, with that being said, they have three characters with, what are most likely, codenames for Sgt. Abraham Ford, Rosita Espinosa, and Eugene Porter.  So my question, is, who do you want to play these three characters?

(Note, Abe should be in Early 30's, Rosita in Late 20's, and Eugene in Early 30's)