<br>(Jim, sorry please move to Audio forum after initial time interval)<p>I recently upgraded my home audio system to a nice denon/polkaudio 5.1 combo with SACD and DVD-Audio capability. I am now hopelessly hooked on the high-fiedlity surround sound. What I used to think of as great sound in the R now seems a bit lacking. Especially when pulling compressed sound from the iPod.<p>What are the upgrade paths available to me for the R? I need a usable trunk so loading it up with 700 lbs of equipment is not an option.<p>Is there an iPod alternative that supports high-fidelity surround sound encodings like SACD?