I took these with a humble little Canon Powershot A85:
I'm not recommending it as it's only got a x3 optical zoom, but it shows that you can get photos into the database with a point-and-shoot.
I don't know the specific cameras you mentioned, but look at reviews on the net in places like
http://www.dpreview.com/ and
http://www.dcresource.com/. In my opinion, once you've got a powerful zoom and say 4 megapixels resolution, the specific features of each camera are a matter of personal choice -- what's most important is image quality. Look at the galleries for each camera with specific reference to sharpness and noise (grain), particularly in low-light situations where the latter is concerned. I suspect you'll find the Olympus gives some of the cleanest images.
Hope this helps a bit.
Make the most of the available light ... a lesson of photography that applies to life