We're in a pretty bad drought right now, haven't had any "significant" snow (which I would consider to be 4" or more) since early November, and no measurable snow in the near forecast either, so I would probably be OK with my current tires (not that I'm driving much anyway - I put 200 miles on my truck in the entire month of December!)
I considered rolling the dice and keeping my current tires on until Spring but I didn't want to be in a situation where we got a big dump of snow and I had worn out tires. I currently have 36k on my truck with the original Goodyear Wrangler Kevlar tires, which may have been great in snow when they were new - I wouldn't know since the truck had 17k on it when I bought it - but they are definitely NOT good in the snow now.
We can get some big snow storms in Springtime - heavy, wet spring snow - so I figured I'd pushed my luck long enough and ordered a set of tires yesterday.
After all the back and forth between BFG AT KO, Duratrac and Wildpeak, I ultimately went with the General Grabber ATX. This is a relatively new tire but has gotten some decent reviews. Cost is about $25/tire less than the BFG, Wildpeak or Duratrac so that's going to save me $100, which is not huge but it's not nothing either. I ordered 275/70/18s and the guy at DT didn't balk at the size even when I told him what I drove (DTs web page says they won't fit but I know they will.)