I have now got a Kindle PW1, a Kobo Aura, a Kobo Aura H2O, and a Kindle Voyage. I'm passing the PW1 on to my husband, leaving me with three that are all nearly perfect examples of their breed. I'm keeping them all, and yet I'm still not totally satisfied
I have loved my Kobo Aura since the day I got it. I found super-slim, lightweight, slightly rubbery feeling cases for it at AliExpress so it's comfortable to hold, practically weightless, and takes up almost no space in my purse.
Now if I could have one exactly like it but with the higher resolution of the H2O and Voyage, then THAT would be my perfect ereader