have time warner hdtv box on new sony lcd with digital/hdtv input... other tv is currently using tivo as "box" for digital signal to older big screen. Do I need another time warner box to get :best: digital picture, or will the tivo suffice?
Your Tivo can only receive your analog cable channels, not digital. If you want the digital channels on the Tivo you need another box.
Call up time warner and ask them if they have their own DVR out yet. Most cable companies now have excellent HDTV DVR's out now for $10/month. Then just sell the Tivo on ebay.