I prefer soft shell materials over hardshells, with the Schoeller materials being my favorite. But if I wear a hardshell I really prefer eVent over Goretex. It's harder to find, but breathes so much better.
For base layers check out the ultrafine merino wools from companies like Smartwool, Icebreakers, and Ibex. A little slower to dry than many sythetics, but amazingly versatile in a wide range of temperatures and they don't stink. Try 2 months wearing the same base layers while on an expedition and you'll see the value of merino wool.
Good gloves are expensive but worth it as it's hard to do anything with frozen hands. I prefer soft shell gloves, but I also have a few 3 layer Goretex gloves with removable liners.
Neck gaiters are wonderful during extreme cold and can be used in conjunction with your wool beanie to make a modular balaclava making them super versatile.
Fleece is nice, but bulky. Synthetic filled jackets are much warmer, windproof and pack down smaller.
Nothing beats high quality down (650+ fill power) for warmth. It outlasts sythetic fills and packs down much smaller, but you need to keep it dry.