My current setup is an 811 in my living room, another 811 in my home office and a 322 in my bedroom which supplies that room and the second bedroom. I would like to upgrade the 811 in my living room to a 622 so I can ditch my bedroom TiVo. Would I be able to just replace the 811 with the 622, or is that not an option? If I can't do this, am I able to replace the 322 with the 622 and switch my whole configuration around and use an 811 on an SD tv in the second bedroom? Any help or advice appreciated. Thanks.