In response to your questions 1)I do not have 7.1 speaker configuration. 2)The Dali's are currently used for L/R fronts. Will probably add the Dali center. 3) The surrounds are nothing great. Some in ceiling mounted rectangular's that came with the house and wired to the front wall. Could easily be changed to a better in ceiling.
Hope this helps in making suggestions.
Steve
Hope this helps in making suggestions.
Steve