There are LOTS of great quilt shops in Western Washington, some of which were already mentioned by ladygen. If I must pick just favorite it is QUILT BARN in Puyallup, Washington which for me is over an hour away. They have an incredible collection of batiks, rows and rows of top quality bolts. Additionally they have thousands of bolts of gorgeous prints arranged by color. The store is well lit and spacious, the staff is always friendly and they offer a Birthday discount: 25% off your fabric purchase once during your birthday month! www.quiltbarn.com
Also, a day trip to Fabric Depot is always fun!