Hi Nick,
I have about 1.25 to 1.5 inch of toe-in on mine. I found this to give better center imaging and more wider stage. If you toe-in too much, sound will get thinner and brighter. But the people at Hyperion seem to like it with no toe in at all. I think you may get better depth without toe-in. Have you tried the Bright Star Isonode feet underneath the midrange/tweeter module? I think you would be surprised with the results, but it does need about day for the feet to settle in.