I go to
Quiltworks Northwest
Keepsake Cottage Fabrics
Gathering Fabric
Quiltworks is big and they also have a large section of Bernina's and beads.
Keepsake is my favorite. They are very down to earth and they are located in the Country Village which has many unique shops. Just watch out for the chickens =0)
I have only been to Gathering Fabrics once but she has a good selection. Elenor Burns had just visited there when I stopped in.