Xfinity TV Channels and ROKU: Where Can I Find The Best Roku TV For Me?

One of these days, I'm planning to add TV to my Xfinity package, and I'm thinking about getting a Roku TV, since my TV doesn't have a USB port. My VCR/DVD Player has a VGA port, which I think is for hooking up a computer monitor, right? Do Roku TV's have a talking feature that allows sight challenged customers like me to access menus like the TV guide? How much is Xfinity TV with channels like Nickelodeon, The Weather Channel, VH1, The Golf Channel, Cartoon Network, MTV, Nicktoons Network, Universal Kids, Food Network, and the Music Choice channel series? Are their taxes and fees involved in the full price?