I'm not trying to argue with you, Adam B., but I did want to clarify that (unless I missed something) the only format the iLiad supports that the Sony Reader doesn't is HTML, and the iLiad's screen isn't any higher resolution, just bigger -- they're both the same PPI, the iLiad just has a few more Inches to have Points Per.

Of course, the deeper levels of gray do make for rather a difference.
All that aside, I'm glad that you have found a device that does what you need it to do.