well title said it all let meknow what u got and how much.
There is only one wireless router & cable modem that I remember, and all i remember is it was a POS.
Get a motorola cable modem and a dlink or linksys wireless and you’re golden.
There are lots of all in ones, however why not just get a router?
I suggest getting a stand-alone cable modem and a seperate wireless router.
Too many network devices in one box = catasrophic failure soon with minimal ability to troubleshoot 
Plus, it gives you the ability to get rid of one router for another, or return a broken cable modem if needed.
isnt the motorola 5120 a wireless router/cable modem?
nevermind it isnt
Na the Motorola one is the SBG900.
Just get a router. Hell a Trendnet router is only like 20 bucks these days.
Another good reason is because (afaik) TW doesn’t charge you for a modem lease and say a power outage or anything fries the modem, or you just want a different model you can always just turn it in for a new one for free, as opposed to having to purchase a new modem.