Originally Posted by Chi Cygni
Sorry, incorrect. I use Opus every day and yes you can sort it by file name. I even checked again before posting this.
edited to add:
This is Opus. SD card, sort by file names, folders, no pdf reflow. On average battery lasts a week with heavy use. 5" inch vizplex, to my eyes less grey than pearl (compared it next to Sony 650 once) Orizon is very grey though.
Sadly Opus is becoming difficult to get. I'll be very sorry one day when it goes to ereaders' heaven.
I've updated the list.
Yes, the Opus sounds like the best fit for me but sadly the couple I could find were very expensive so I thought I'd give a $45 Kindle a go first.