If you haven't done so already, take a look at a couple of Zymurgy articles on this topic:
Late Hops: The Secret to Hop Aroma and Flavor
-Jamil Zainasheff, May/June 2006
Hop Bursting: Maximizing Hop Flavor and Aroma
-Mitch Steele, Nov/Dec 2013
Jamil's article provides some good insight from a couple of brewers, including Matt Brynildson of FW, while Mitch's article takes a deeper dive into utilization rates.