If you're looking to buy a high-definition plasma or LCD TV in time for the World Series, it's a great time to be in the hunt: Prices are at all-time lows, and many models boast fast refresh rates of 120Hz or even 240Hz. Our tests have shown that these features can make a difference over the entry-level 60Hz models--you can expect smoother viewing of fast action and panning scenes, for example, both of which are common in sports viewing (and more common than you'd think in film viewing, too). The latest sets also boast Internet connectivity, with built-in apps for accessing Web-based content, and the ability to interface with services like Netflix, Amazon on Demand, and YouTube. PC World has up-to-date ratings and rankings of all the major TV categories and sizes, whether you need a 40-inch set for a smaller room, or a 55-incher to wow your guests. Be sure to consult our chart rankings, where we provide test results on picture and sound quality on all the newest sets, and pick the best in each size category based on our performance tests and hands-on experiences.