EagleWings
Headphoneus Supremus
After much fiddling and listening, I now completely agree with Ike1985's assessment of fully open, screwed-in MAMs. In fact, I believe this is my sweet-spot. Extremely open and airy, but the tight membrane still allows plenty of bass oomph. Having them fully open has the added benefit of not having to find and keep a sweet spot somewhere in the middle; I know I'd be constantly checking that I hadn't accidentally knocked them out of position.
Now, let's see how these two compare...
Great. Looking forward to your impressions..