Honestly, I understand the blanket response.   You may have really good design ideas, but they likely receive 1000's of other ideas sent by customers who think they know the business and/or the engineering behind what they do. I have been working for manufacturers for about 20 years (not...

They are snug. I know how you feel, but most of what you are dealing with is the ear bud tips. The other thing I did was upgrade the cables to the Linum Bax which are super light. With those 2 upgrades, I can barely tell the ear buds are there.    With this setup, I use them while bike riding...

They come in a pack with several sizes, so you should be able to find something that works for you. I got mine on Amazon.   http://www.amazon.com/Sony-EPEX10A-BLK-Replacement-Earbuds/dp/B001RB24UA/ref=sr_1_1?ie=UTF8&qid=1429820112&sr=8-1&keywords=sony+hybrid+eartips

I had the same problem and tried several different ear bud tips. I ended up with Sony Hybrids. They are perfect now.

I personally did not like the Spinfits, however my ears are finicky. I have a set of medium and small if someone wants to take them off my hands. 

I have the BaX mmcx paired to my JVC FX850 iems and the weight savings and flexibility alone was worth the upgrade in my opinion. With the stock cables I always felt like the weight was tugging the earphones out of my ear. Now I feel like they aren't even there. Bass seems to have more detail...

I ended up with Sony Hybrid tips. The others I tried would not sit well in my ear. 

My previous daily driver before I obtained the Omega.

  I would imagine it sounds great but if you like your music on the louder side, like I do, you will probably want to use an amp.   It's night and day for me with my Philips L1 when I plug up my O2.

The DX90 definitely doesn't need an amp for iems. I mate my DX90 with o2 amp when at home to drive my full size headphones though. I love the sound from both configurations.

That may come into play soon. I really do not think TAGs are very special anymore.

I haven't put on any of my TAGs once I got my Omega Seamaster! 

Look what finally came in for me!   Sat in customs for only a day. :)  

I haven't got my O2 or my DX90 to work off my Windows 8.1!

Nothing if your budget matches your taste in time pieces.