I agree that the new firmware improved the bass situation. And that's why i said "slightly"... but it's not gone. SoulViper mentioned he doesn't care much about ANC. And If that's the case, I'd actually recommend to check out the Sennheiser Momentum Wireless 2. Better sound signature (lively...

These are reasonably comfortable. They are light and cushioned. But sound is bassy in a slightly irritating way. Never tried the BW’s but I suspect those are more natural. And there’s no multipoint (dual a2dp), if that’s important.

I wish Sony would add true BT multipoint (dual A2DP) with a firmware update for the XM3. Aside from "commercial strategy" (i.e. pushing users to upgrade to next version if it comes with that feature), anyone sees a technical obstacle?