I finally pulled the trigger and bought an HDTV DirecTV TiVo system. It's got two tuners and allows me to simultaneously record HD programming over the air and off the dish. The picture quality of HDTV is mind-blowing. I can record 200 hours of normal television or 30 hours of HDTV. I'd been waiting for a long time to buy either an ATSC tuner, but I wanted the TiVo capabilities. This is the first unit like this I'm aware of. DirecTv has to come out and put a new dish on my house to support the unit, since it requires three LNBs on the dish.