I am new to TiVo, and haven't actually bought my TiVo yet. I currently have a Comcast box with DVR, but I'd like to get rid of cable altogether if possible. So, I am looking to replace the Comcast DVR with a Series2 dual tuner. For now, I plan to downgrade my cable to just get the local stations, but I hope to figure out a way to get good reception without cable (OTA) later. If I do that, will I still be able to use the TiVo? And will I still be able to use both tuners?