GMA Callisto vs. Reference 3a De Capo i

I have never heard the GMAs but I did own the De Capo is for a little over 2 years. I don't believe that the De Capos are bright but they are definitely not forgiving either. If you are using ss electronics and a not-to-great CDP I would not go near the 3As. On the other hand, with a good tube power amp, even SET, and a decent front end, the 3As will floor you. They are best heard in the near field but this is quite normal for a monitor of this size. With the exception of the Quad ESL, which I am now using, I liked my DeCapos better than any speaker that I have owned in the last 10 yrs..