(A) The latest HR10-250 software is v6.3a. It was released about 3 months ago. What version do you currently have? Look under "Messages & Settings" -> "System Information".
(B) Your DVR just needs to be connected to a phone line.
(C) Only you can decide. Some folks have reported problems with audio dropouts when recording certain over-the-air channels, such as Fox. DirecTV is working with Tivo on a fix that will hopefully be released soon. You will definately find menus much faster and you might like the Folders/Grouping feature.
(B) Your DVR just needs to be connected to a phone line.
(C) Only you can decide. Some folks have reported problems with audio dropouts when recording certain over-the-air channels, such as Fox. DirecTV is working with Tivo on a fix that will hopefully be released soon. You will definately find menus much faster and you might like the Folders/Grouping feature.