Camping gear, IMHO, is not something you buy based on advertising. Since you admit knowing nothing, this leads me to believe you do not know what you need or what choices are out there. Spend some time reading books on camping and hiking and then start asking questions and reading forums like this one. Read the articles on this site, other than in the forum area, that cover gear and clothing choices. Ask your friends what they use.

While I saw some interesting stuff on the Fjallraven website, much of it is pretty expensive, which is an issue for some people, but more importantly, this brand is not well-established in the US, so customer service would concern me. Their retailers, at least in the LA area, look like trendy clothing stores, not serious outdoor stores, although their website shows a few dedicated stores in other parts of the country.

The trip you are planning is pretty serious hiking. I would be looking for the lightest gear possible and this site can help with that.