Gunbei,
I just sold my 2.5's to return to the 1sc's. My experience of the 2.5's was not the same. I do think they are a fabulous speaker. They have great bass and are seamless from top to bottom (providing one uses good speaker wire), but I did not think they where a top contender in the imaging department. Sure the sound stage is larger than the rather small sound stage that the 1sc presents, but they did not disappear the way that the 1sc's do, no matter how I placed them. I suspect that adding the Sub to your system may be the reason for our different experiences, who knows, could be a lot of things.
I just sold my 2.5's to return to the 1sc's. My experience of the 2.5's was not the same. I do think they are a fabulous speaker. They have great bass and are seamless from top to bottom (providing one uses good speaker wire), but I did not think they where a top contender in the imaging department. Sure the sound stage is larger than the rather small sound stage that the 1sc presents, but they did not disappear the way that the 1sc's do, no matter how I placed them. I suspect that adding the Sub to your system may be the reason for our different experiences, who knows, could be a lot of things.