With Mitsubishi's LaserVue lines humming along once more, it's time for the company to bust out a few more big announcements in the HDTV space. First up is the new Unisen line, comprised of the 151 Series (40-, 46- and 52-inches), the 153 Series (40-, 46- and 52-inches) and the high-end Diamond 259 Series (46- and 52-inches). Each set in the line comes with a built-in "5.1-channel" 16-speaker audio bar, much like the iSP LT-52149 that we reviewed last fall. Each model also incorporates a new UltraThin Frame design, Smooth 120Hz Film Motion te
