I use to have the Special Ops helmet.
Chancellor, in reply to your prior question, none of the clone trooper helmets come with a display case - only the stand. Display cases for the helmets, however, are sold in the aftermarket, as you probably know. Ebay seller kodofett is probably the best case maker out there - I'v purchased from him several times.
As far as issues with the Special Ops, I think there were some problems with the uniformity of the blue paint on the helmet. Some of them, if I'm not mistaken, had two different shades of blue.
The one I had was fine, though.