On my iiyama 24" 16:10, at 1920x1200, the most lifelike by far is...
57 degrees.
If you do this, and then turn off the steering wheel (bear with me), and then angle the view down a little so you can see the dash, and then put your wheel as close as possible to the monitor, it's pretty damned close to looking out through a real car window. Extremely cool and lifelike.