There was a pretty good discussion of question in two differents threads:
https://www.mobileread.com/forums/sho...d.php?t=106453
https://www.mobileread.com/forums/sho...d.php?t=104769
I have both a Kobo 1 and a Kindle 3. I prefer the Kindle for reasons that you'll read in the thread. That said, I liked the Kobo 1 when I bought it. Used it for about a month until I found a used Kindle 3 for a good price. My wife still uses the Kobo and has no complaints.