"I tried CoolReader and really like the parchment style background..."
I'm one of those stick-in-the-mud types who writes custom themes to have featureless white-on-black or black-on-white text. My wall paper on the G5 is extracted from a blank medium gray jpeg. YMMV.
I'll have to try Aldiko. Most of my stuff is on Kindle, since I have a K3. I do have some ePubs, but most of those are not encrypted, so Cool Reader works fine. I also have a lot of rtfs, which most other Android readers won't display.
Curmudgeonly,
Jack Tingle