Inventory Issues

We recently received a remarkable amount of inventory space, but it hasn't changed our "active inventory" capacity. Currently I carry with me the following items (75/80 with Shihei and Keys):
Purchases I'd like to make, but can't really find room for:
* Avalon Breastplate (okay, I should get this and use it instead of wasting space on Merman's)
* I actually have a PDT set, but can't carry it around comfortably
* Nebula set/MAcc neck
* HP+/Enmity set^
* Fast Cast set
* Wind obi, in theory
* AF3+2 body

So, obvious first thing that would help is to gear based on what I'm doing and leave everything else in Satchel. So, if I'm doing NMs I probably won't need my MAB set. If I'm doing normal mobs, I likely won't need my MAcc set or MDT set.

Basically, I'm indecisive and wish I could carry everything around at once so just changing macro pallets would let me change my role. Halp? Do you see any place I could consolidate gear choices?

^ I've been wondering about the usefulness of such a set. I could see making minor sidegrades in favor of Enmity (like Ocelot gear) when you intend to be tanking, but a big part of me feels that I generate more Enmity using the TP for WSing than some kind of Waltz-force build.