I dunno having the 8's with a great amp and the odac have made me forget about my 4's and the need to purchase another ciem for quite a while. The portaphile really makes the 8's shine. I can't wait for the 627x.
Agreed. There may be some that prefer that type of sound but directly against the odac and port you can certainly hear the differences and they are anything but subtle.
Try a/b'ing directly to another amp dac.