Thank you all for your responses. Seems like I am a little over my head. Too bad there isn't a program where you can just place your text, set your sytles for headings, body and paragraph subheads, and then out comes the ePub you need for a given device.
I have about 200 Word files and corresponding ePubs in Calibre that do look good in Aldiko. I was trying to be open at looking at the new Apple Ipad Mini with Stanza or Shubook.
Looks like unless I want to re-do all my work, I'll either stick with my rooted Nook Color and Aldiko and Calibre Companion, or get a new Galaxy Tab 2 and just place Aldiko and Calbire Companion on it.
Mega thanks for all your advice.