In my experience imaging and depth of sound stage has more to do with speaker choice and speaker position in the room. I have Pass Amps with WP7's. I recently moved them 1.5 feet further out into the room. Originally at 2.5 ft, bare recommended distance from back wall. A major improvement in the areas you describe. CD players or transports offer different presentations as too detail, position of lead voices or instruments to the stage, degree of analogness, and complexity of subtle secondary sounds missed by some. Edginess of high frequencies and base and certainly change between CD players. Therefore, a new improved player will not go unnoticed.
Good luck! Richard
Good luck! Richard