HiFiMAN needs no introduction around here, so I'll simply share my opinion briefly. In my mind, not only are they one of the premier manufacturers of headphones and related gear, but - and this is possibly more important - they deserve a lot of credit for helping advance the headphone industry in general. Of course, they aren't alone in this category. Plenty of others have done amazing things over the last few years. But I can't think of anyone who even approaches the broad portfolio of HiFiMAN. They have gear competing for best-in-class in a variety of categories - their HE series of planar magnetic headphones, their RE series of IEMs, their EF series desktop amps, their HM series of portable players... all that remains is a dedicated DAC or two to completely cover the full range of HeadFi hear.