I like that headgear>headphones currently has filters for manufacturer and category, but the market has changed in a manner that adding a third filter for headphone impedance will be very helpful for users.   In years past, one could generalize that IEMS and earbuds were the only headphones...

I have about 1 TB of music in FLAC format, and that same music in LAME mp3 v0 format that uses about 350MB in storage.  As the quality of portable music playing increased, I went from LAME mp3 v5 to v0, but I find that it's a pain that basically nothing affordable and high quality also offers...