I've been disappointed with the tints of the latest Quark neutrals. The high CRI models that are out now are another matter entirely; I'm very pleased with the tints they have.
I bought a high CRI Preon 1 first, for my keychain, and liked the tint so much I bought two more of the 1x123 high CRI models, and additional 1xAA and 2xAA bodies for those heads. The one on the 1xAA body is now my main light in my EDC bag, and the one I put together with the 2xAA body is strapped onto the waistbelt of my hiking pack as my dedicated hiking/camping/backpacking light.
They won't be as bright as one of the X models, but tint is much more important to me than overall brightness.