Not quite the same experience as visiting B&H in NYC, but definitely a welcoming haven for the traditional photographer.

I'll be in Chicago for a few days after New Years. I've got a small list of needed items, but I always keep my eyes open for the things that I would forget I need until I see them. As regards the weather, we have always had good luck with Chicago regardless of the season. That could change, but on vacation who cares?

Cheers,
Tom