The star of Amazon’s newly refreshed line of tablets is the Kindle Fire HDX, and it appears to be a faster, sexier, and smoother experience on all fronts. Available in 7-inch and 8.9-inch versions, the HDX ($229-$579) certainly appears prettier in its revamped molded magnesium body, with its buttons in better places, and oh yeah, sharper screens (the 8.9-incher owns a 2,560×1,600-pixel-resolution screen). One new feature seems perfect for the technologically challenged (or lonely) user: the ‘Mayday’ button. Just tap it and Amazon says you’ll be chatting up a live tech support specialist (G-rated material only) within 15-seconds. That’s 29 minutes and 45 seconds faster than Domino’s guarantees its pizza deliveries, by the way. The guts of the HDX models include a 2.2GHz quad-core Snapdragon 800 processor, 2GB of RAM, a quad-core Adreno 330 GPU, and internal storage in either 16GB, 32GB, or 64GB varieties. The Wi-Fi HDX will start shipping November 7, while the 4G model heads out on December 10.