We have a 522 receiver. I would like to upgrade sometime to an HD DVR - maybe that Hopper that is being heavily advertised. The problem is that we still have a lot of shows on the 522 that we haven't seen. While new programming comes in, I can't ever see us clearing up the backlog completely. So, I was thinking that I'd try to do an upgrade, but try to keep the 522 around on its own to watch the shows on that while new material arrives on the new DVR which has a lot more storage capacity. Anyway, I was wondering whether Dish would let me do this and how much it might cost to do the upgrade these days. Any advice? Thanks.