I have been using the camera on my (old) 550 for taking snapshots of the surroundings of a found geocache. Such a picture will be used within the log. Since you will also receive the optional accu-pack, it's well worth the value. I found a website (in the Netherlands) that sell the Oregon 600 for €380 en the Oregon 650 for €389. Wow, a difference of 9 euros ...
Eric