My Vote: No.
In addition to being a full-on Buffy/Angel supporter, I also simply don't like Nina. I might not have such a problem with her if she wasn't an obvious could-be love interest, but as her character stands now, I'd prefer never to see her again. I have my heart set on Joss keeping Buffy and Angel together in the end, if he even has Angel wind up with anyone by the final episode. The only way I see Nina and Angel winding up together is if Joss wants Angel to be in a more "stable" relationship, one not so dramatic (but then again, if Angel is redeemed, that wont be a problem). But that would only mean Angel is settling for less than what his heart wants - I admit to being able to see Angel and Nina together, but I could never in a million years imagine him loving her anywhere near as much as he loved/loves Buffy.