Ojdeteos, not that I could afford the Sunrays, but I have had the Contriva Diacera SEs for about a year and a half and have heard the Sunrays sound both great and poor with the BAlabo amps in two CES shows. I would imagine that in a large room the Sunrays would excel. I think they sound very much the same. There are several pairs of Sunrays for sale at great prices. I haven't seen Contriva Diacera SEs for a long time.