Hi Rey, currently the RV016 is the only multi-wan router (greater than 2). The RV016 is still a current release product and does not have a next generation model. I don't know what are the capabilities of the Cisco 1900 series. I do believe it has available HWICS for more WAN interface cards.
Here's an example of a VDSL card for a 1941
http://www.cisco.com/en/US/prod/collateral/routers/ps10536/data_sheet_c78-584157.html
-Tom
Please mark answered for helpful posts
-Tom
Please mark answered for helpful posts
http://blogs.cisco.com/smallbusiness/