Audeze MM-500 is the newest, open-back, planar-magnetic headphone by Audeze, made in collaboration with legendary Manny Marroquin. It is priced at $1699.
Hifiman Edition XS is the newest open-back release from Hifiman. It is a planar-magnetic headphone using their Stealth Magnets technology, and it comes at $499.
Hifiman HE-400i 2020 is a new over-ear planar magnetic headphone coming at 169 USD, making it +/- 3 times less expensive than its predecessor.