A week after they went on sale, Panasonic's 3D TVs have sold out. Early adopters love 'em.

Surround sound reaches a new and more affordable price point with the Sherwood RD-5405 a/v receiver, just $149 list. You get five channels of 70 watts each and HDMI connectivity. The step-up model, the RS-7405, may be available with or without HD Radio. Our poster boy is a prototype of the iNet 2.0 which offers iPod, USB, ethernet, and wi-fi connectivity plus internet and FM radio -- and it's a photo frame.

The most reliable guide to power ratings isn't the specs provided by the manufacturers but the measurements made by our technical editor. He follows the mandates of the Federal Trade Commission in measuring power output and distortion with all channels continuously driven (along with a less-demanding two-channel spec). When objective third-party measurements aren't available, here's a quick-and-dirty means of sorting high-power receivers from the junk: Just feel the weight. Aside from the nefarious inclusion of useless lead weights, more pounds indicate either the presence of a heavier power supply or a heavier, more-sturdy chassis—ideally, both. All things being equal, with conventional amplifiers, you don't need expensive test gear to figure out that a 50-pound model is likely to play louder and cleaner than a 15-pound lightweight, even if both are rated at 100 watts per channel.

Price: $1,800 At A Glance: First A/V receiver to include Trinnov Optimizer • HQV Reon-VX video processor • Big beefy chassis

Say Hi to Trinnov

The Sherwood Newcastle R-972 A/V receiver is the first to include a new player in auto setup and room correction technology. Say hello to the Trinnov Optimizer. Nearly two years after it was first announced, the R-972 has arrived. After endless behind-the-scenes tweaking, this product will surely trigger debate and discussion among surround enthusiasts.