Doesnt't it feel like there have been three of the same stories in different form but identical in comments?
Anyway, The N810 is also an N800 with a transflective screen, making it very readable where the N800 is not, and thus fits the requirements better. Yes, I own both (and owned a 770, for good measure).
I would caution against any of the eink devices if you insist on webbrowsing on the same device. The refresh rate and limited web media and browser functions make for a frustrating experience. I carry my Sony 505 with me all the time, but it's for fiction, not random access (i.e. textbook, techincal, or webpage reading) as page flipping is still painful.
Your best bet, if the N810 is too small, is to find a tablet PC with a transflective screen. Motion Computing and Itronix slates can be had fairly cheaply on ebay; Fujitsu P1610/20 and U810/820 convertibles also are options if you can do without a transflective screen. I have a U820 and love it (and its high ppi and long battery life), but if I were you, I suspect the greater utility would be found in a P16x0 series.