speaking of researching, i was discussing with willy to make a short balanced MK3 for my ES100, and he sent me the newest batch of MK1, MK2, MK3, and also the 300ohm. I used to have the 300ohm, but there's something about them that was off for me, some of them for the lack of bass with thin foams, but too warm mids and veiled treble with thicker foams...so it's a bit of a conundrum there..to say it bluntly, the 300ohm was my least favorite Willsound.
so when i opened the package, i was reluctant and decided to listen to it the last; MK1,MK2, MK3, briliant as always.. but then i put on the 300: and suddenly it's up there with the PK32 as my most favorite Willsound.
good amount of bass even with thin foams, clear mids and treble, with overall balanced presentation, deeper soundstage than the PK32 (although the PK32 is still the willsound king of stereo width), and overall cleaner sound than the MKs. definitely recommending this version of 300ohm. an auto buy for me