I was very interested by the Kobo Mini. I bought an Astak Pocket Pro a few years ago. It had that 5-inch screen and I love the light weight as well as the form factor but I've been spoiled by Pearl Screens. I still use it once in awhile but that old Vizplex screen feels too washed out now.
I still love that little book reader. I can't believe I paid $230 for it though. That was a pretty good price at the time but the Kobo's price is so much more attractive.