I am using a MacBook 2.1ghz Duo Core 2, 4gb Ram, 500GB HD. When I run iTunes or FrontRow, the internal fan goes crazy and loud. This lead me to think of a ATV in its place. I am using an Apogee DAC via Firewire to Hi-Fi system. The Apogee does have optical in too. Am I gaining or losing going to ATV?