Loveknitting.com carries a very large variety of yarn weights and blends, everything from lace to bulky and baby to luxury. They carry some exclusive lines to them such as Paintbox, Milla Mia, Willow and Lark and Main Street Yarns, each offering diversity in choice for projects. Paintbox and Main Street are mainly acrylic or cotton yarns. Paintbox offers extensive colour choice and Main Street larger put-ups. Milla Mila is 100% Merino or 100% cotton yarns that are highly plied making them lovely round yarns, great for cabled projects.
(photo credits below are those of loveknitting.com)