Please have a look at the new 850-series or one of the older 800 series if you must have that serial. DSL will be cheaper though. You say that you need VIOP, suppose it's VOIP but in fact you probably mean QoS support for voice. That's supported.
If you need a Call Manager Express, the minimum model is the 1760.
No idea what this would cost in your region. Do you want to buy a new router or a second-hand one?
Regards,
Leo