The reason Assured Access rep pitches the v.90 is because of the package pricing model they are using which for us works sence we need ports. So the only advise is to evaluate your own needs and situation and look at the offerings. I amd getting two of the x1000 assured boxes and moving the modems all into the same box. The second box is for routing only. We have heard the same pitch from Assured Access.
Price is also an issue.
I think it is more cost effiecient.