Beautypedia is owned by Paula's Choice, so there is a bit of bias in the reviews. The site reviews Paula's Choice products, alongside others, and (shocker) gives them all 5-star reviews.
I've been using SheaMoisture products recently on my hair. The brand is much cheaper in America than it is out here, IIRC. Same for stuff like DevaCurl (I realize this is not helpful if you have straight hair...).
As for makeup, I think Makeup Forever might be an American brand? Drunk Elephant skincare has been getting rave reviews over there too, and they are based out of Texas, I think. Very pricey, but might work out ok with exchange rate by the time you go.
I think Drew Barrymore has/had a makeup line in Wal-Mart. There are also drugstore makeup brands like Neutrogena, Physician's Formula, and Cover Girl that don't seem to get as much promotion over here, but get great reviews, depending on who you ask. Or at least, they aren't sold in my bonny little corner of Scotland.