Very good description of the DBAs vs. the Zeros, and owning both is a treat. Your take is what I would like to say, but could not figure out how to say. Typically, I do favor the DBAs for on the go listening, walking the dog, etc. When I am at home, I also love hooking the burned in Zeros to my T3 and Touch via LOD, and soaking up the detail, though losing the more fun sound of the DBAs. But it's very nice to have both. I really don't feel like I need to buy any more expensive top-tier universal IEMs, something I used to think I needed to get the best sound for me.
Update:
After a A/B last night, I have to say there isn't much missing detail-wise from the DBAs that the Zeros provide, not to my pedestrian ears at least. So while the Zeros are, as you say, a great value, to me the $50 or so is well worth it. I think the DBAs will impress more than the average listener (LFF, Joker, rawrster are three). That makes them sound like they are less accomplished in some way, but now, after two hours of back and forth, I don't hear that.