I chose loyal no matter what but if I"d have bothered reading (duh) then I would have chose consider features but prefer to select a certain brand. The reading done on my ereader is strictly leisurely (did I spell that right?) so I really don't need wifi or can-do-my-laundry capabilities. My 505 was my first reader and I remember saying that I will have it forever b/c it's the best thing in the whoooole world.
Until the 600
I love the dictionary feature on it and will put little notes to remind myself of certain things. No, the screen quality is not as good as the 505-that's b/c it's
not a 505. It is still rather enjoyable and have not had any problems. I didn't think I wanted a touchscreen and now that I have one it is marvelous! Very attractive design, I love the feel and look of it.
All in all, I am loyal to Sony but if something comes out that could possibly be better than my 600 (IMO) than I would consider it if it would improve the quality time spent reading.