I definitely don't think it's all that big of deal what brands and models of gear you use--that can always be updated later on, and, to a great extent, we can all make do with less than ideal gear and just learn as we go. But there are a few things I didn't see in your list:

Lighting--I think it's good to have two sources, one headlamp and either a second headlamp or a handheld flashlight as back-up (with extra batteries)

Navigation--map, compass and, as a backup, a GPS (but the map and the compass for sure ... and knowing how to use both)

Also, a lighter, matches, and I always carry firestarter candles, too. Oh, and a multi-tool of some sort or pocket knife.

And I do think it's a good idea to bring thermal underwear, no matter the area or the time of year.