My old Tivo box is on the outs and I'm thinking of going w/ the Dish HD DVR instead. I am a current Dish subscriber and when I chatted w/ a CSR yesterday they said I could upgrade for $50. I contacted them today to see what kind of receiver I would get. The new CSR said an upgrade like that didn't exist and quoted me $150 for the 622 and $20 for the 722. Does anyone know the actual promotion I could get and what receiver I should be wanting?