Base specifications for both models start with an Intel Core 2 Duo 2.26GHz P8400 CPU, 4GB of DDR3 RAM, 320GB hard drive running at a decent 7,200rpm, LED-backlit display, slot-loading DVD burner, integrated 2-megapixel webcam and 64-bit Windows Vista Home Premium.
The 16-inch 1640 model offers an option, however, to upgrade the RGB LED LCD display to a true 16:9-format version, rocking 1,920x1,080-pixel resolution. And instead of the 1340's Nvidia 9400M or 9500M graphics, it offers ATI's Mobility Radeon M86XT card, featuring 512MB of graphics memory.
In the 1640, you can also opt for up to 8GB of DRR3 RAM (the 1340 is limited to a maximum of 4GB), and the option to add a Blu-ray/DVD combo drive (Blu-ray is read-only).
Currently the models are only on sale in the US, and both start at $1,199 (£800). We'll bring you an update regarding UK availability when we have it, but they're not yet on Dell's Web site.