HP adds nx9420, nx6310, nc6320 to Core Duo lineup

HP has added three more Core Duo laptops to its lineup with the introduction of the nx9420, nx6310 and nc6320 models. All three feature 17-inch widescreen displays. The nx9420 (pictured) has a four-hour battery and an ATI Mobility Radeon X1600, and weighs in at 7.3 pounds. The nx6310 and nc6320 are somewhat lighter at about 6 pounds. All models include dual layer drives and WiFi, biometric security and 7-in-1 memory card readers.