On the advice of a colleague, I've recently started using "Lisa's Tailor Shop" in the 3.3 Mall and have been pleased with the product. Shirts cost 100 a pop and suits go for 1000-1800, depending on fabric quality. Last month, I brought one of my Paul Smith suits there and asked them to copy it with double stitching; they did a bang-up job. I don't doubt that the places in the CBD are better, but I'm pretty sure that a big portion of the price difference goes towards paying their sky high rents.