In this order
Yuin Pk1- The Senn MX580 is 5x less expensive and almost as good for only $30 Yuin in general is just awful, cheap plastic IMO compared to a few other models out there for equal price. Easily the most over hyped set ever
The Grado SR60-325i - For being the most useless sets you can buy, only good for rock, literally the worst design and most uncomfortable overhyped nonsense ever to grace the headphones world. What genius thought it was a good idea to have a nice long thick cord, the most uncomfortable earpads ever that force you to buy SENNHEISER pads just to make them less painful, dirt cheap plastic housing, and a UNBELIEVABLY stupid long and thick cord on a set that cant be used as a monitor set to begin with. What the hell, grado?
seriously...shame really because the RS series is freaking amazing, but everything before it is just craptastic.
Sennheiser HD595 - because its the HD555 in disguise that is far cheaper. Still sounds amazing though, so its not on the list for sucking, its just on the list because of it having the same driver as the HD555 that is half the price.
Sorry if ive offended anyone, but I really hate the entire Pk series and the ENTIRE grado lineup from the 325i and back. Just awful sets that I wish both yuin and Grado would start paying me to use their garbage.