I've been listening an average of about 6 hours a day to facilitate them burning in. I detected a change in the soundstage today, seemed to flatten out so I moved them around a tad. Have a nice deep soundstage with better focus with a slight toe in. I'll see how that settles in the next week or so before making any changes again if needed. Amazing how much difference small increments can make. I have the "Get Better Sound" book to help me along.
As many recommended, cable change will wait until I'm satisfied that speakers are run in and stabilized.