I have always been a little fuzzy on this stuff, but I understand that active (amplified, powered, etc) splitters may avoid some of these losses. You may want to consider this option. While I don't doubt they may introduce noise into the signal, the move from analog to digital may make this a non-issue. I have three splitters, all powered, sending signals to 11 TVs throughout the house. I am satisfied with the picture quality.
I am on basic cable. It is still mostly analog, but includes local HD stations. All channels come through to all TVs without any degredation in picture quality that I can notice.