Quail vs Chickens?

I have been raising chickens for a while, but quail have recently peaked my interested. Looking at Cotournix, but also maybe interested in something a bit more exotic. What do you recommend and how are you keeping your quail housed?

I have both chickens and quail plus other animals.  I like both of them for eggs, however, you really need to use the special scissors for their eggs.  I mostly feed the eggs to my dog.  I love how easy quail are to harvest, however, it takes so many of them to feed the family.  I love that they are so quick to mature and how easy it is replenish the covey as long as you have an incubator.  So will I probably always keep them, yes.  But I will always have a laying flock of chickens and a batch or two of meatbirds per year also.  
I built a quail tractor to keep them in when we don't have snow on the ground.  Before it snows I cut the flock back to about 10 female & 2 males and keep them in two birdcages in my garage.

Most species of quail are nomadic or semi-nomadic, meaning they can't be free-ranged. On this basis alone chickens are far superior, given that they can provide themselves with a portion of their daily calories

What type of housing do you guys recommend?