there is always the struggle of measuring for bandwidth needs and type:
guaranteed(4.5mb dedicated 600-$900) vs best effort(comcast business cable 100mb for approx $200 a month)
New small office with hw vpn tunnel back to main office hour away.
onsite AD replicating across tunnel.
VOIP phones back to IP phone system pbx at main office.
eight users (mostly sales)
conference room with tv and want to do some type of tel/Vid conference back to main office.
moving of 30/40mb art/pic files from and to main office.
of course will wan to prioritize voice traffic and vid traffic vs data traffic over tunnel.