In my pc I have an Asus Xonar Essence STX, and I recently bought a macbook pro to use for video editing and stuff, but the audio sounds terrible.    Is there any way to get audio output with the quality of the Xonar Essence STX on my macbook pro?

Long story short, I'm a light sleeper moving to NYC to attend NYU next year and I'm used to sleeping in a silent room, but I'll be in Manhattan with a roomate.    I am looking at custom fit iems, particularly the ultimate ears custom, and am wondering if anyone who owns them has tried...