Sony's groundbreaking Alpha 100 stacks up well against the Nikon D80, and not just in savings ($150 less). Sony's advantages include self-cleaning CCD (the Nikon has software dust mapping, but this take both forethought and post-production trouble), on-the-fly dynamic range fixes (Nikon's D-Lighting can only boost shadows, and only after the shot), and, most important, CCD-based anti-shake that works with any lens (Nikon's Vibration Reduction is available in only a few lenses). The Sony's AF is slightly faster throughout the EV range, although the Nikon AF is still better in motion tracking, has more zones, and can focus down to EV -2. Their TTL flash capabilities are comparable. The Nikon has the clear advantage in image quality (10 percent higher resolution and awesome noise control-moderately low at ISO 3200, a sensitivity the Sony doesn't even have), better in-camera color controls, and a much bigger lens catalog.
Check specs and pricing on the Alpha 100 in our Buying Guide.
See the full test results on the Nikon D80.