I have never really understood why your average consumer would buy a separate modem and router. The vast majority of connected households in Australia make use of ADSL connections, and thus don’t need specialised hardware to be able to physically connect to their gateway. In my experience, consumer-grade modem/routers do not lack for features or connectivity options. After spending some time with the Western Digital My Net N900, it seems that the answer is because much more attention seems to be paid to the features and usability of a specialised device.
The month that I have spent with this router has been very positive, and has led to a concession that perhaps it really is worth considering the extra expense of a good quality router.