We originally purchased these with backs because they were much cheaper; about $25 cheaper per set.  As it turns out, they didn't fit.  They were too tall.  So we chose these, and we absolutely love them.  We increased the number of seats in our dining area by 4, bringing the total guests we can entertain to 10.  The antique gunmetal color is outstanding.  They capture and reflect the light very well.  They look very upscale, with a rustic flare of course.  Excellent purchase.