In reply to TheDrunkenBakers:
I have a Play:1 and a Play:5. The sound on the 5 is great and the 1 surprisingly good for the small unit. Compares favourably to my old Naim amp and JPW speakers. The general feeling is that 5 is better than a 3, which is better than a 1 - but two 1s are better than a three. Two 5s as a stereo pair are generally felt to be comparable to a good studio monitor, but the cost rises accordingly.
Setup is only easy if you wire the bridge (or a unit if you aren't going to be moving it) to the router. Bridge wired to a PC, attached by wireless to a wifi network is flaky. Once I had that sorted out I have had no further issues with connectivity.
The software allows e.g. an alarm to be set to turn on the radio on a certain unit at a certain time. Similarly pressing the play button as described above starts where you left off... so if it was set to the radio it will start up again with a press.
The Play:1 belts out music in the garden quite nicely (we have a big garden and happy neighbours!)
The major advantage of a Play:5 is that it has an audio line in, which can connect to the audio line out of an Airport Express. Thus it is easy to send any audio output from a mac or iOS device to the whole Sonos network (e.g. whilst listening to TMS as England are disembowelled by Mitchell Johnston).
Sonos wins on elegance and wires every time IMO. We sound like we have similar needs and it has worked well for me (especially as I got a very good deal indeed for the 5). If you can afford it a 5 is much more flexible due to the line in.
hth
b