I own a ATH-W1000X connected to an amp. Rega Ear and I want to make a better amp. for a warmer sound. I have understood that the best options within my budget range would be a Woo Audio 6, an HP 8 MKII Audio Icon or Burson HA160. Please tell me which you think best for the type of music I hear it's only classical music, and my Rega Ela speakers are few that offer a very musical sound which is what I like. Thanks!!!