CK Moustache
100+ Head-Fier
I have 2000j now, so I would rather skip Dunu (I also don't like the looks of 30001 pro).
They would probably be way pricier in Europe.
The DN-2000J and DK 3001 Pro are tuned way differently. They're around 430€.
The FH7 are overall decent - just the really forward central midrange (especially when the inner vents are blocked, which is pretty much unavoidable, at least in my ears) is definitely a matter of taste. As for technical performance, the 3001 and FH7 are about equal, but the DUNU are tuned more accurately (close to the diffuse-field target) in the mids. Really good IEMs, but imo perhaps just a bit too "technical" in the lows for what I personally expect from a hybrid implementation with DD bass; the FH7 are a bit more "typically" dynamic driver-like there, although overall rather on the more technical side as well (if I go the hybrid IEM route, I want IEMs that are less "BA-like" in the lows and linger more, otherwise I take multi-BA models right away - then again, I don't want the lows to be muddy, slow garbage either (as it is the case on IEMs such as my Trinity Audio Engineering Delta V-II or Sennheiser IE 80)).
The Sony, on the other hand, while ultimately perhaps not as resolving and not really outstanding in any particular area, offer what I would describe as the "typical" hybrid IEM characteristic in the lows, with ample amounts of body, texture and slam. They definitely have their fanbase, and I really like mine as well for recreational listening (in fact they are among the very few hybrid IEMs that I personally really like).