I own the HeadRoom Total BitHead and I used to own the NuForce uDAC-2 HP. I would recommend the NuForce uDAC-2 HP at $99.00 USD which you can buy it from Amazon. It produces a dead silent background and it creates a very clean sound. If reproducing music is your top priority, then this would be a good entry level recommendation. It will give you a taste of the high end and you can make a determination if you want your Asus laptop to be your source component or if you want to delve deeper into more traditional high end audio components such as CD players, headphone amplifiers, loudspeakers, power amplifiers, and headphones. I believe that simplicity is preferred to complex designs and the NuForce produced a cleaner sound than the HeadRoom Total BitHead. Get the Total BitHead if you want to power two headphones or earphones and you need cross feed. The NuForce uDAC-2 HP can accept up to 24bit/96kHz signals so it will work for DVD-Audio and DVD-Video source materials. Don't spend any more money until you make a firm commitment to get more involved in this hobby. You can make a lot of terribly expensive mistakes that you will regret. I have done so myself.