We have been very happy with the Panasonic phones purchased in the last few years. Our latest one has a generous memory for numbers that you want to block, as well as the usual phone book and answering machine functions.
The range is excellent, easily half a block. As a bonus, you can set it to not ring for the first ring while it performs Caller ID. As a result, blocked numbers do not ring at all. Very nice.
It also announces Caller ID information with a fairly intelligible computer voice and speaks the digits of the numbers that call with no Caller ID information, or speaks the name you entered in your phone book, which really helps when people call from their cellphone. As you probably know, cellphones seldom provide more than the number calling. Having the name spoken when someone calls is helpful for us old folks who may not remember everyone's cell number.
All of the cordless handsets share the same address book, but they can have different ring settings. The extension in my office area is basically mute. I can hear the Caller ID information spoken by the extension in the kitchen, if I want to. Or, ignore it easily enough if not.
Highly recommended, especially for the phone blocking features. We used to have an external blocking device because most phone's that block have such pathetic memory capacity. That extra gadget was awkward to use.
