The KXTCD 447 comes with all the fetures you need (dual DECT Handsets, Speakerphone, answering machine) without those you probably don't, such as SMS. The manual is well written and it also comes with a cheat sheet covering the most useful functions. You can set different tones for intercom or external calls, although the 8 tones (and twelve melodies) supplied are not the most tasteful ever created.

Ligo: ordered in the afternoon, delivered the next morning. Much faster than promised. Service exceeds expectation...
Product: well packed, easy setup, clear cheat sheet, pathetic ring-tones, pleasant to handle.
In short: everything is as should be or better with the exception of the ring-tones. How expensive can it be to bake in a chip that can deal with polyphonic ring-tones?
Would have given it 4.5 stars but had to choose between 4 and 5....