Visibility depends somewhat on the build of the driver, but the Monte Carlo is particularly awkward.
What I would suggest is that you visit the "new car" section of www.edmunds.com, and look at the photos of the various sedans. What you're looking for is a reasonably small "C" pillar, that is, the part of the roof that comes down between the rear door and the rear windshield.
Cars with wide C pillars, like the Monte Carlo 2004 model, will block vision. Slimmer C pillars, and cars that appear to have taller rear windows, would be the best.