We barely got any content with Nicole (Envy) so I wouldn't be so quick to say that she's girlfriend material, it's still to soon to judge, we still don't know much about her. I would love to see more of her, but I doubt we will.
Speaking of Jill, I like her just because of her personality, sweet and kind all around, looks doesn't matter that much for me. I'd say right now she's one of the best girls to go for (relationship wise.) despite not knowing much about her and her family. That can change quickly depending on how Jill's story will play out, but I don't think it's gonna be something drastic. I'm not even a huge fan of her, still I think Jill is a great choice in the long run, that should say something. It's just a thing of preference, no problem if you think otherwise.