Ray Samuels Audio Emmeline HR-2 (with the stock AD797 operational amplifiers) -> Ultimate Ears Ue-10 PRO (hard acrylic). I have been using this combination for well over two years with no problems whatsoever. It has been an excellent combination.
Right now, I am listening to Anna Netrebko in Violetta: Arias and Duets from Verdi's La Traviatta with the bonus DVD-Video. She is probably one of the best upcoming opera stars in the business.