Bob, I like Linksys.
My setup is a little different than you want though, as my wireless was an add on a few Christmas's back when I got my Dell laptop which is hooked up via wireless only here.
Mine consists of the Motorola 5100 Surfboard modem, a Linksys Vonage router for my landline and three cat 5s out for PCs, and a Linksys wireless access point that takes up one of the cat 5 ports on the router.
You can get a wireless router from Linksys that is both wireless cat 5.
This way your PCs can use the cat 5 ports, and your laptop will be wireless.
That is the way I would go if I did not have Vonage.
But I am locked into their router since it does my phone too.
Here is what you would probably need.
http://www.linksysbycisco.com/US/en/products/Routers
My access point is the WAP54G further down the page.
Your local Best Buy will carry these, and they should be able to steer you in the right direction for Comcast.
Linksys got bought out a few years back by Cisco, a very big company.
I like their stuff better than Netgear.