I have owned every Kindle since they were created. I also have iPad3 & 4, iPad mini, Nexus 7.
Here's why I'm still buying Kindles. Nothing, but nothing beats a purpose built eBook reader. And I'm not talking Kindle Fire.
I'm currently using the Kindle Paperwhite.
Specifically for reading, it's the culmination of years of experience. It's got an incredibly impressive display you've got to use to believe.
It's the best $119 you can spend if you're an avid reader like me.
Light, perfectly illuminated in all light levels, I wouldn't be caught without one.