Wow, ok. Sounds like you've invested a lot of time into researching all this! Although you didn't try the Brainwavz ones I asked about on the 99 Cs, it sounds like you've pretty much tried out every other combination left! lol For best fit and comfort, I would say my old Sony MDR-1A HPs were the best. I recently was at Best Buy and they had them on display in the Magnolia section. I tried them on again after selling mine like 2 years ago (had them for like 4-7 mos)..........STILL ULTRA comfortable. Unfortunately, I can't say the same about their sound quality. lol Not a wide soundstage, and they were a bit muddy/bassy in sound. Yeah the B/W pads I mentioned really did add comfort and distance from the speaker drivers to my ears, which gave way to a bigger soundstage, and which meant increased clarity.