Need hardware recommendation for a new modem/router to replace apparently unsuitable hardware

"I'll look at the documentation on the modem/router, but you should be able to set it up such that the modem is plugged into the wall, the ""WAN"" ethernet port on the WRT is plugged into the modem, and your internal network is plugged into the WRT's switch.

I had to do something similar when I was on DSL; the LEC insisted that I had to use their modem, and that was the only way it worked. The subnetting was a bit wacky, but it can be made to work.

Edit: Leave it to me to always make more work for myself. This is a post on the Linksys forum explaining how to set up precisely what you're asking about, without doing the subnetting weirdness that I put myself through."