CS3 B&W workflow update

With my Photoshop work flow for creating my black and white image, one of the first things I did after making the RAW conversion, was to make the global highlight and shadow adjustments by applying a Layers adjustment level. It now appears that with the new Photoshop CS3, I have stopped applying a Levels adjustment layer to my images in favor of making the same creative adjustments using a Curves adjustment layer.  Even as I review my earlier images that I created with Photoshop CS, I am deleting the levels adjustment layer in favor of using a curve adjustments layer. It simplifies the image workflow process and reduces the file size and provides the same results for making the global image highlight and shadow adjustments.