How about the Jetbook/Libre? They don't use the eInk displays, and therefore don't have that refresh, but still have a really easy to read grayscale screen. The battery life is measured in time (24 hours or 2 weeks standby) rather than pageturns (7500 on the Sony 300 iirc), but still quite long. They take SD cards, and can display PDFs fine. Does not have note-taking, does have bookmarking, the Jetbook has dictionaries (it's from a company that does translators) but the Libre does not.
There is also the Jetbook-lite which uses AA batteries instead of an internal battery. This makes it good if you're going to be away from any power source for a while. (Noting that the other two can charge from either AC or USB -- so a generic USB car charger should work fine.)
//Edit: Worth noting that the Libre and Jetbook are identical hardware, just with different software on them. The Libre handles more formats (including ADE DRM'd PDFs and ePubs), the Jetbook has the dictionaries (including bilingual) but no DRM capabilities. The Jetbook-lite is the same as the Jetbook, but able to handle eReader DRM.
Last edited by Nakor; 03-05-2010 at 02:01 AM.