Just an update. I am enjoying my iMac immensely. The "learning curve" seems to be rather intuitive, rather then needing to look for or read lots of documentation. I like that.
My MS Outlook problem was resolved rather simply. Since I installed Parallels and then WindowsXP anyway, installing the Windows version of MS Office was the simplest solution. True, I don't have all my past emails (prior to iMac day) in Mail this way. But I learned that migrating all of that from Outlook to Entourage was a rather complex and not altogether guaranteed process, requiring it first to be exported into Outlook Express, then doing something with it, and then getting it into Entourage. I still wouldn't have it in Mail anyway and some data that I wanted could not be migrated even into Entourage. So I concluded this solution was more acceptable as well as being much simpler. Since I have the Windows open all the time anyway there is really no problem with it.
One of the first differences that I noticed between Windows and OS X, is in removing a program. With Windows you first must go to control panel, then to "add or remove programs", find your program and remove it there. Then oftentimes, you must go into your "Program Files" directory, and look to see if a folder for that program remains and if there are any files left over in it, which then also have to be deleted. On top of that there are certain instances when remnants of the program still exist in the registry and need to be somehow "cleaned" from there as well if they interfere in some way. With OS X, I simply right click and "Move to Trash" and eventually "Empty the Trash Bin". The simplicity of this compared to Windows is almost laughable. I'm sure I have just scratched the surface here with my own new discoveries.
To be continued.........