Honestly, I think it would be interesting to see Sensei work past his gynophobia by getting used to Tendou's sister. Though new girl has no chance with him.
Personally, I like the personalities of both dog-girl and Reina, though Reina's closer to my ideal partner, I doubt she would ever be interested in a relationship, and it probably wouldn't be healthy, so I'd probably go for tomboy, though ideally I'd want to date both if given the option.
@Akane02 I go off of personality, so you do you, man.