I agree with nologic about the impossibility of getting a good custom suit for a cheap price, and also about the quality of WW Chan. If you do go to Chan, expect a minimum of 2 fittings and a minimum of 4-6 days for a suit.

WW Chan also makes several trips to the US each year. I recently saw his rep Raymond Kiang in Boston, and the prices are (inexplicably) less than when I ordered clothes at his shop.