Originally Posted by agentsim
What's the best way to check the sensor without risking any undue damage by exposing while I'm poking around?
Best not to go poking around but instead take a lens (preferably coded) and a media card and take a few pictures. Try and take them as you normally would, meaning shutter speeds, aperture and ISO choices.
Then print them to 16" x 24" and get a magnifying glass and go over them, or do it on screen after tapping the "/" button.
Even then I'd say you still won't know if you like the camera until you've a had it a week or two and get to know its little ways and the ways of your lenses with it.