> Smartwool L/S zip-t
A fine choice... and the majority of people here would make the same choice. I would rather take a MH midweight eXend LS zip shirt. I prefer PowerDry to wool because dries faster, is more comfortable against my skin, and the embedded silver is more odor resistant than wool.
> 2x MHW Canyon shirts
Reasonable. I might consider doing one Canyon shirt, and one technical tee-shirt. Sometimes you might want short sleeves, and you can also wear the tee-shirt under the canyon shirt for moderate layering.
> Bozeman Cocoon Pullover
Fine choice depending on how sensitive to cold, and what the low temps are that you will face. If it was me, I would take a vest like the Montbell Thermawrap or Patagonia Micro Puff unless I was going to be in subzero weather.
> Patagonia R2 vest
Rather than a vest, I would suggest a dark sweater made from a micro fleece or high quality wool. Provides some insulation for your arms and your core. I assume on your RTW trip you will sometimes be in cities and might want to go someplace nice. A dark sweater can make you look more dressed up.
> Wildthings epic hooded windshirt
That is a nice jacket, but given that you are bringing a WPB shell, I would go for something more light weight which is also more compact. There are a number of 3-4oz hooded windshirt out there.
> Patagonia Specter W/B Jacket
I would rather go a little heavier and have pitzips like the Montbell Peak. But if you are happy without pitzips then the Specter looks pretty sweet.
> Marmot silkweight boxers
> Smartwool microweight boxers
> MHW Featherweight X-tend tights
> 2xMHW Canyon pants
Nice pants. If it was me, I would most likely go with one pair of Cloudveil pants made from the Inertia material (wider range of comfort and more weather resistant) and a convertable pair of nylon like those from Ex Officio (I like being able to take the legs off and I like cargo pockets).
> Golite boulder shorts
I would think about shorts with a built in brief like Patagonia River Shorts. They can be both shorts and a swimsuit which I expect you will want at some point in your journey.
> Golite reed pants
Things that are missing:
2) Hat: I would bring some sort of sun hat, and some kind of warm hat
3) scarf or neck gaitor: You get a huge amount of warmth for very little weight.
4) Gloves: if you are going places that are cold, you should have some sort of gloves.
5) Headnet: if you are going anywhere with lots of nasty bugs
My notes from packing for international travel