The EOS 5D seems to be roughly equivalent to the D300 but it's $600 higher in cost (according to the website)..
Please do not get confused. The 5D is a full frame sensor, with much larger photosites than the D300. They are nowhere near the same camera. The image quality that can be had from the D300 is not in the ballpark of the 5D.
That's not to say the D300 isn't a great camera, it is... but it's no 5D in the sensor dept. Plus, the 5D is Canon's 3 year old technology, and people are still comparing it to the (current) D300 LOL. The 5D will be replaced/upgraded soon too.
