I have 6 eink ereaders in my house. My son has a Sony T2. My husband has a Bebook Mini and a Kobo Glo, he only uses the Glo now because he likes the built in light and the fact that I installed Coolreader for him so he can change pages by tapping exactly where he wants to. I have an original Cybook which is only a backup now as the software is very slow, a Sony T1 with FBReader installed, and Kobo Glo with Coolreader installed. I use the Glo most of the time now because my husband likes that the back light is not as bright as my booklight was. The Sony is a great backup though and since I got it was refurbished and on sale I do not mind not using it all the time.
I think I just love technology and the ereaders are getting better and better all the time. Maybe what I need to do is create a tech review website so that I can try out these great toys without having to buy each one.