Some Photography questions

Hello

I need some professinal photgraphers opinions here.

I want to a buy a DSLR camera and am looking over a couple: My current selections in my price range: Olympus E-500, Nikon D-50, Canon Digital Rebel XT

I have looked at reviews and features and teh E-500 seems to be the best. The one thing holding me back is why is this camera cheaper than the others when it has more features and a bigger lcd plus it came ou this year?

Another question: The E-500 also has a aspect ratio of 4:3. Is this a bad thing does it make it harde for me to get a lense when the other ratio is 3:2?

Please vote which camera you would get.
Thanks
-Phil