As some end-users may know, E Ink recently unveiled its new e-paper screen, the Pearl display, and Sony was quick to adopt this new technology, its first move being the implementation of the Pearl in its newest generation of e-readers.

For months now, Sony, Amazon and Barnes and Noble have been fighting over the e-reader market, with other offerings having begun to sprout up only recently.

Thus, it is no surprise that Sony would do its best to stay competitive, especially with E Ink finishing its latest Pearl display which, among other things, has 50% better contrast.

As consumers may be aware, Sony has three e-book reading devices on sale, each aimed at a specific customer base.

These three are the Sony PRS-950 Daily Edition, PRS-650 Touch Edition and PRS-350 Pocket Edition.

All of them feature 2GB of internal storage, which can hold a large number of e-books, and the electronics also boast touchscreens.

The main difference between the three siblings is their screen sizes of 5 inches for the Pocket Edition, 6 inches for the Touch Edition and 7 inches for the Daily Edition.

The last and largest of them also has the advantage of wireless connectivity, via WiFi and 3G, and this also makes it the one most versed in acquiring new content.

The Daily Edition can acquire new titles through direct download, while the other two are restricted to using an USB or SD/Memory Stick Pro.

Nevertheless, all three have touch input support, including for a stylus, which allows e-books to be digitally marked.

The Sony PRS-950 Daily Edition will supposedly drop in price to $299, starting November, while the Sony SRS Touch Edition will sell for $229, in black or red casings.

Finally, the Sony PRS-350 pocket Edition will be priced at $179 and will sell in silver and pink variants. All devices come in brushed aluminum casings that are lighter than plastic.