The Sony PRS-505 reader holds around 160 eBooks (has a eStore with over 20K titles).

Sony PRS 505Sony PRS 505

The 505 holds around 160 books, and supports Memory Stick Pro Duo cards for more memory. The 505 is available now through Amazon for around 300$.

E Ink display info: 
6", 170 DPI, 8-level gray scale
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