AutoNation or CarMax?

Here is a look at both AutoNation (NYSE:AN) and CarMax (NYSE:KMX)

My thoughts are this:

CarMax will hold up well during times of crisis,but, when that crisis ebbs (they always eventually do) AutoNation will outperform. Of the two, the current GM, Chrysler dealership shedding has far more benefited AutoNation in terms of its market share.

I also am not sold on the "used car" model longer term. Again, in times of stress it will, while not prospering, hold its own so to speak. I much prefer the diversity of options and product mix of an AutoNation.