After many years with the 625 DuoDVR, I'm ready to upgrade to HD. After reading many threads here I have determined that I will probably have to switch from WArc to EArc which will require relocation of my dish on the roof due to line of sight issues with the Eastern satellites. Also, I'm not sure which of the 722, 722k or 922 receivers would be best for me and their associated upgrade costs. Is there a table listing the feature differences between the receivers? I plan on just replacing the 625 with a similar HD DuoDVR, plus I have the In Home Service Plan. I'm in the Jacksonville FL DMA.