Tom Teesdale is an excellent builder and offers a relative bargain
http://www.tetcycles.com/index.html

Ira Ryan is also great. He used to build for Vanilla in Portland and is now on his own. I know him personally and can couch for his skill and honesty.
http://www.iraryancycles.com/

CORRECTION: Ira did not build for Vanilla. Sacha White is the sole builder of Vanilla bikes. Ira built his first bike under the tutelage of Mr. White. My bad...