Last year when I reviewed the 1080p <A HREF="http://ultimateavmag.com/flatpaneldisplays/806sonykdl46/">Sony Bravia KDL-46XBR2</A>, I concluded that it "really knocked me out." Now we have the new Bravia KDL-46XBR4. It's similar in many respects to the 46XBR2, but offers significant improvements. These include better black levels, a new, slick on-screen menu system, and 120Hz operation—a feature that's showing up in more and more high-end LCD sets. Depending on its implementation, a 120Hz refresh rate can reduce image smear with moving images—one of the lingering problems of LCD display technology.