Do you know how the R/80's sound signature compares to the DJ100? I wonder if the R/80 and old TD/80 share the same drivers.
I prefer neutral or very slightly above neutral bass. Slightly forward mids are a bonus. If I don't like it I can at least use it's pads on my DJ100
So far the only cheap (under $50) Koss headphones i've liked are the UR-55, KSC75 and the Porta Pro somewhat. I miss the old TNT/55. I think that used the KSC35 driver perhaps.
I think the R/80 are better than the DJ100; they fit better/are more comfortable, they have a more balanced and warm sound versus the DJ100 (less midrange honkytonk), and a better soundstage (although it's still relatively congested compared to much higher end mdoels). Build quality is probably not quite up to par, and the packaging is very much not up to snuff. But at half to a third the price (especially if we're comparing to the TBSE), very good indeed.