Not that I wouldn't take fashion advice from HN, but I would never take fashion advice from HN. I can guarantee there are more important things you can do to change your appearance and 'have an effect' than wearing a bow-tie. An example would be having a proper fitting suit, which most men can't seem to understand. This can show attention to detail.

I'm not going to go on because frankly there is probably a threshold for interviewers - if you look like shit, its a bad thing, if you are passable then that is status quo. It won't matter how well you dress beyond that unless you're being hired as a stylist.