I have yet to feel anything other than stock or ACT 2600, but from all the feedback I've heard I will recommend Southbend. The DXD is a 6-puck sprung hub disk, so that is probably why it has an somewhat aggressive engagement. They also have a full faced disk with a metal-backed kevlar face called the TZ series.
Check them all out here -
http://www.dxdracingclutches.com/home.html
Call them up if you want to work out something custom. They are very friendly and will work with you to create the clutch you want.