I'll second what CJSTARR advised. You get what you pay for. If this is you're first digital camera buy then go ahead the run of the mill approx 5MP cameras. But, if you are a camera buff, then you may want to seriously consider stepping up to the more expensive digital cameras, the ones that can go for $400+ and more, some much more. I've heard lots of compliments on the Canons. I know almost nothing about cameras but my wife does and I've seen the differences between the $200 digitals and the $500+ ones. It all comes down to what you're comfortable with. For most people the ones you're considering will be fine.
Steve
Steve