Originally Posted by trogdor
In either case, you'd probably want to dress so that your clothing is not noticed, and so that the committee focus on your excellent paper, inspiring teaching, and fruitful research plans. That means nothing that would attract too much attention -- no pocket square, flashy cufflinks or loud pantherellas. French cuffs, in my opinion, are fine, but I'd avoid anything like contrast collars, tie clips, pinstripes and so on.
This is good advice, but I would also leave the French cuffs at home.
Haven't you already seen many job talks as a grad student? I just finished at a Big Ten social science department, and I would say that you should wear a suit, not a sport coat. It's the most important presentation of your career, at least so far. Wear a sport coat for the second day where you are just meeting faculty and not doing the job talk.
The only exception in my mind would be if it was last-minute and your only suit did not fit well, but you had a very nice fitting sport coat and pants. Academics generally are not going to notice fit issues like SF members, but if you have something really egregious (e.g., it's two sizes too big, which I've seen on a job candidate), it stops looking professional and starts looking comical.