I have a vk60 and vk50se. I've tried the electraglide fatboys, Shunyata Viper, Fim Gold, Kimber Palladian, and Trans Ref.
I personally like the Fim, Kimber and Trans the best. I've also tried all the cords with-without a Cinepro 20. The Bat seems to like without the cinepro the best. Everything else loved the cinepro.
Right now, I have the Kimber on the amp and the Trans Ref on the preamp. Fim was good, wish I had 2 of those to try out...