Sanity check - an Internet enabled flat screen has a $200-1,000 premium over a similar TV without the internet capability.
AppleTV costs $99, and takes a single HDMI connection on your TV, is wireless, small and completely silent (no fan).
But a roku box ($59 to $99) is far cheaper. I got one about a month ago and I love it. Combine that with a digital antenna and I am seriously considering dropping cable.