In an earlier post, I mentioned the granite place here in Seattle we are using for our kitchen. At the time I published the post I didn't have the name of the company or their web site address, but I do now. The company is called ValueStone. They have a pretty nice web site - www.valuestone.com.
They offer a great deal and they have been a pleasure to work with. Very knowledgeable and straightforward. They sell pre-cut slabs that start at $250 a slab. We're going with Giallo Veneziano for our kitchen, which is a little more expense at $295 a slab. We figure we can do our entire kitchen with 2-3 slabs. Not bad at all.
They are exclusively a granite supplier and do not handle installation. However, they are happy to recommend several installers that have done good work for their customers in the past.