Kobo Glo is what I was leaving towards now. All I want it Aardict (for offline Wikipedia) and QuickDic (for language translational dictionaries), hence the need of the card slot. Although both are claimed to work with the Sony PRS-T1 I did have until it broke recently neither ever worked in my case! I hope it wont be the same with the Kobo Glo if I go that root...
The same seller does also stock the Nook ST Glo though, so I can be persuaded to change
