Critical components of an e-reader, for me:
- 300+ PPI resolution (the fonts looks like print)
- Preferably, a "yoga" style cover that enables hands free use at a table or in bed
The Barnes and Noble Nook looks like crap, with poor accessory support. This leaves two options: Kobo and Kindle.
Total: $160. This is with no ads, great book selection. Its backlight supports the "redshift" kind of thing, where it goes red at night to reduce eyestrain.
Total: $135. This is with no ads on the front screen (when sleeping). With targeted ads, the device is $20 off. This also has audible functionality, if you do audiobooks.