I am building a computer with Realtek ALC892 audio built into the MoBo. I was wondering if I would get a noticeable sound improvement from purchasing a discrete card, and if so which one I should purchase. I have a 5.1 speaker setup for my computer, but my headset is USB (G930, which does not use the computer's audio). It is a high end gaming rig, for games of all types (including FPS games).