Those Genalex Gold Lion's are on the mid-range aggressive/bright side. They worked well with the polite sounding HEX V2s, but I disliked them with the Utopia, and suspect you'll find they don't pair well with the HD800s either. I am now using Tesla 6922s with the Utopia, a mellower sounding tube that (for me) pairs reasonably well with an aggressive/bright sounding HP. Agree about the mid-range haze/veil with LISST. I haven't even bothered trying them again. Even the stock tubes sound more pleasing to my ears.