I am toying with the idea of upgrading my Bell Express vu satellite system to one with Dolby 5.1 capability. I have a few questions and would like advice. 1. Are there any (Bell) DD5.1 receivers available that are not PVRs? (cost is the factor here) 2. How much programming is actually available in DD5.1? 3. How is the sound quality, and is it consistent?