So I just wanted to give you an update.
I went ahead and bought the iPad 64GB, even though I was worried about eye strain etc.
I've spent hours reading highly mathematical PDFs without any eye strain or flow problems at all. I'm not sure how they've done it, but my eyes tend to get tired when reading from a normal screen, but not at all from the ipad.
The seemless page flipping is great, and the responsiveness of the device is very very impressive. Sun glare is pretty bad on sunny days, and it can overheat from being in direct sunlight (it turns off and tells you to wait for the device to cool dow). But personally I never read outside since 99% of what I read is academic papers, and reading math/statistics in the sun hasn't really ever worked well for me, too many distractions
For those looking for a large screen academic reader, I would without a doubt recommend the iPad. I think a lot of you who are in my situation have become tired of waiting for the e-ink manufacturers to get things done and the lack of information.
If you have any questions regarding academic reading, don't hesitate to ask.