I guess I'll chime in on the Corona which I got to try briefly. I'm completely new to e-stats so the ones I tried here were my first (probably spoiled on them now). The Corina to me was spectacular, great reproduction of string instruments and nice impact from drums. Probably the best part of it was the sense of space; very wide and nice depth. Felt almost like I was in a room with music playing. I also tried the Stax 009S which was also amazing, but I would say the Corina edged it out slightly in all respects; truly one of the showstoppers for me that I was really impressed with.
On a side note, I tried the Meze 109 Pro off of Headamp's GS-X mini and was stunned. Such a dynamic and powerful headphone for a relatively low price. I'm definitely going to upgrade my amp to a GS-X mini after hearing it with a couple of headphones and might need to get the 109 pro down the line as well.