Line Audio is better than Primo for recording music.
I don't own them so I can't comment, but you are not the only one on this forum that praises them for music recordings, so I don't doubt it.
...And since OP already owns both the Line Audio cardioids and omni's there's no harm in testing them to see if self noise levels are acceptable for the intended purposes.
OP asks for ambient and environmental recording advice in a small package, not music recording, so that is what I am trying to respond to.
For the past almost 10 years, I have used a matched pair of (unbalanced) EM172 from FEL Communications (Specs almost identical to EM272:
https://micbooster.com/microphone-capsules/8-primo-em172.html ).
Although I also use these for quiet concerts, my primary use has been field recording. I don't recall a situation where ambient background or room noise wouldn't kick in before I could notice any self-noise.
I have one DPA 4060 I mainly use for its intended purposes, as a Lav mic for speech, and it is great at that - but I am not sure I would call it a quiet microphone.
Since the DPA is XLR terminated and my PRIMOs are stereo 3.5mm terminated, I have not made side by side comparisons, though.
I haven't checked if it is available, but even if one of the DPA 406X variations would match the low self noise of the PRIMOs, I wouldn't feel the need to make such an investment, nor would I want to expose such value to the situations I use them in the field.
I find these mass produced Primo capsules to be a great value-proposition for ambience & field recording.
Those of us interested in that type of recording are lucky that we have companies like FEL Communications and LOM microphones which assemble very useful quality microphones we can buy without an endless number of importer, distributer and dealer mark-ups.
FEL Communications Clippy series:
https://micbooster.com/10-clippy-and-pluggy-microphonesLOM Microphones:
https://store.lom.audio/collections/microphones-accessories