I went to John Lewis last week and got some freedom Sincere DK organic cotton in a darker grey, thus solving the stripe dilemma. I really like the way this yarn feels and how it knits up. I'll have to remember it for the future.
I always get a little sad going into the yarn section at John Lewis, because the majority of the yarns are wool or wool blends, but I can't use them due to being allergic to wool. It's a shame, because they're beautiful yarns. Even the bamboo yarn they carry is blended with wool (I love bamboo yarn).