I currently have the Fiio FT1 which is and was supposed to be a temporary headphone (and a Fiio K15 on amp/dac duty). I like what the FT1 can do with its bass, and the overall voicing is quite good with a bit of EQ tweaks. But the soundstage went quite small coming from Audeze planars (which I got rid of because of the weight).
Weight? The weight of the Sennheiser HD 480 PRO is only
273g.
Check the review
https://diyaudioheaven.wordpress.com/measurements/brands-s-se/hd480-pro/
Anyway, I would wait for the FiiO FT9. From
"Flagship HIFI Over-Ear Headphones with Dynamic Driver FT9 FT9 is a type of closed-back over-
ear headphones with dynamic driver. Instead of using the popular open-back planar magnetic
design, one reason is that many users have told us that there are few excellent closed-back
over-ear headphones with dynamic driver nowadays, and they hope we release one; the other
reason is that we believe, from first principles, that most recordings are made using moving-
coil microphones and from the playback end, dynamic drivers can reproduce the recording more
accurately. Not to mention, the resolution of advanced diaphragms is not weaker than planar
diaphragms, but the large low-frequency dynamics that dynamic drivers can achieve are
something that planar diaphragms cannot currently match in principle.
We have actually been developing FT9 for two years, but haven't released it yet, mainly
because we have been refining the sound details, especially the diaphragm, which requires
extensive prototyping, testing, and improvements. Computer simulation can only help solve
some curve problems, but it cannot yet address listening impressions.
Another aspect is the acoustic design of the cavity. Although the acoustic design of
headphones with dynamic driver is already mature, different cavity shapes and materials will
produce subtle changes.
However, a flagship product is a process from excellent to exceptional, not like going from
entry-level to flagship with obvious differences. So, we've been very cautious.
Like other flagship products, we will try to gather as much feedback from audiophiles as
possible before mass production and release.
The tentative release date for FT9 is around September."