Splitting the cable shouldn't degrade the cable until you split it a few times. I have the single cable from the pole going into a 6-way splitter: Two lines go to HD cable boxes and four go directly into other TVs so they just get regular cable signals. The signal is fine in all TVs. How are you planning on getting HD programming? Do you have an HD cable box or cable card that will allow you to get HD without the cable box? Is your Tivo HD or Standard Def? The single cable brings in both SD and HD signals, but you need either the HD cable box or cable card to decipher the HD signal.
I am getting ready to set up my 40'' JVC LCD. In the current set up with my old TV, I have a splitter right at the wall connection. One side goes directly into the TV for viewing when TIVO is recording something and the other goes into the TIVO box. As I see it now I will probably have to do the same thing once I have the new LCD up and running. Does splitting the cable line degrade the HD quality? One side would be for TIVO and the other would be for the HD programming. Would I benefit from having a double cable connection wall plate over just having a single and splitting the single? Any ideas, helpful input, or additional questioning is greatly appreciated. Thanks.