Thanks for the info! The MT was second on my list because so many people on the thread recommend them for SQ and they look like the outer ear would offer some support for the buds, not just the ear canal.I may be able to help you eliminate a couple options (based on my experience anyways).
I can speak towards the MT and AZ70 from personal experience. AZ70 I had fitting/comfort issues with, and folks have complained about battery leak issues. I would definitely recommend MT over the AZ70. AZ70 has better build and case, but MT is better for what you are looking for (great sound quality, spectacular battery life, good fitting), but the stock tips are a bit slippery. I am on the verge of ordering the epro tips, but after I get my replacement MT. Xelastec are very good, but people have had size problems with it & apparently it's very sticky in the ear (quite a few have said it picks up earwax so I am avoiding them).
Anyways, Gemini are the best of the lot, but by far the most expensive. If you have the budget for them, I think they outclass the rest. If you want to keep the cost down then I would highly recommend the MT.
Since you mentioned the Gemini were the most expensive, I double checked the price and realized they are out of my price range so I removed them from my list. Thanks for the reality check!
So far it looks like it's either going to be the Z7s or the MT. I heard that Xelastec tips deform over time, but the Crystals, not so much. But I'm desperate to get a good seal so if someone suggested drywall anchors I'd give it a shot. Let me know which tips you settle on.