Beware of free trials with Sling TV. I have had a bad experience with them in this regard. They offer them, but give you know way to get out of them until after you have already received your first $19.99 charge. They will refuse to refund your money and are not at all customer friendly. I find their “Take the Money and Run” tactics shady, at best.
You might also be able to save by bundling your TV and Internet subscriptions: After a recent move, one of the authors of this guide, Chris Heinonen, discovered that with his new Internet provider, it was cheaper to get Internet service bundled with TV than without. However, once Chris added the cost of multiple cable boxes and DVR service, those savings disappeared. So Chris currently rents one non-HD cable box, which sits in a closet unused, and uses an Apple TV, Roku, or tablet to stream all his family’s favorite shows. This setup lets them start and finish shows on any TV, and it offers more flexibility than any cable box would. (The downsides to this strategy are that one can’t “record” shows for offline viewing, and each network you want to watch must provide an app with streaming support—but more and more networks are offering such apps.) In the end, Chris saves around $10 a month compared with paying for Internet alone while also being able to stream the Olympics, college and NFL football, Mr. Robot, The Americans, and more directly to his iPhone and various media streamers.
Ultimately, your final decision will completely depend on your needs, what services you subscribe to, and how much of a hassle you're willing to deal with. I'm still married to my home-built XBMC box, but I'd have to say the Roku was easily my favorite of the pre-built options. It's insanely cheap, has tons of streaming services, and with the addition of Plex, can even do some basic playing of network files. The Boxee Box was also pretty nice if you're willing to sit and configure it, while the Apple TV and WD TV Live provided great plug-and-play solutions. The Google TV is a bit more of a wild card for those that have specific needs, but provides a lot of configurability and niche apps that the others don't have (or, alternatively, makes a great feature-filled Plex box). Check out the home pages for each device to see more about what they offer and where you can buy your own.
ClearStream's final entry is the 4MAX, which is an improvement on the 4V when it comes to range and general setup. Quality-wise, this offers what you'd expect from the previous ClearStream antennas with a 70- mile range and 4K capability. That said, the 4MAX is able to bump up the range a bit in the right conditions. And it does use a more streamlined design over the 4V, making the overall setup much easier and saving a bit of space.