Yes, admittedly, I think John got it right... I had in my head to run these close to max +/- simply because I could, without really considering real world benefits. Just thinking more headroom, higher dbu output, but I hadn't considered whether or not I need it. Thanks Harpo, for doing the math for me, you are certainly correct once I think it through, there is no real world benefit for me to run these hot. Even though I've looked at the datasheet, I failed to think about when anyone (specifically me) would actually need >28dbu.
Thanks for reminding me to think about why I'm doing something, not just whether I can or not!
;D