I think the Kobo Glo will be my next e-reader.
I really had hoped Sony would step up to the plate, but they are lagging further behind with every next step they make. I have given up on them.
Instead Kobo's products really show progress and they have many of the features I am looking for in my next reader: High Res, glo light, stronger processor.
I would love a 7" version of the Glo though.
Also Kobo tends to improve their firmware frequently. They are even adding new features for older readers, if possible. Sony does nothing of the sort.