I guess it is off topic, but since we don't have Tilted Outdoors..
I upgraded a lot of my hiking gear before this trip. My best purchase was the tent. It's a Norwegian tent (
HelSport, Børgefjell Light 3Camp) . Very light, and the only 3 person tent I've seen that can actually fit 3 people. Lots of lines can be attached so it's pretty indestructible to wind.
Clothes I keep as light as possible. I can't stand waterproof jackets and pants, since they get sweaty no matter how high tech they're suposed to be. I have two sets of cheapo, light polyester pants+jacket. If I get wet or cold I put on long underwear. Good underwear (mine're Devold, 2layered wool and synthetics) costs a lot, but it's definitely worth it. If I have a fleece sweater in addition to that I can be comfy in -20C.
Let's see.. I have a fleece hat/turtleneck (SkiBum) and windproof gloves + thin gloves I can use as inner gloves or as is (from REI). Leather hiking boots and thin woolen socks beats any GoreTex when it comes to keeping dry, avoiding blisters and stinky feet. HelSport 85+30 liters backpack, Ajuingilak sleeping bag and inflatable mattress, silk liner for the sleeping bag (easy to wash and keeps the sleeping bag clean), Primus gas stove, MSR Blacklite aluminium pots and a telescopic fishing rod. For the longest hikes we packed a lot of pasta and freeze dried, just-add-water-ready-made meals. Alright, I'm probably boring you here
Here are some pics of the tent:

The entrance area. Good for cooking and backpacks.

The inner tent. Ventilation is important if (when) someone rips one off.