Yeah basically. Just buy a wired router and some ethernet cable. If you really want the best, get this router:
And get CAT6 cable. Not CAT5, it doesn't support the max speeds of the router. To take full advantage of the router, you need CAT6.
So basically, the coaxial (TV) cable will come out of the wall and plug into your modem, the modem will be hooked up to the router with the CAT6 cable, and the router will be hooked up to the computers using CAT6 cables.
OCZ PSUs are decent, but overhyped. They're not as good as most people think they are.