After looking very long time I have then decided on this and am disappointed bitterly.
Comfort is OK, but the (maximum) volume is coupled to a BlackBerry, unusable for me. Even in very quiet but ICE 3 the callee can only be understood with the utmost concentration.
Result: Headset is used only at the desk and the Reserve's rubber be used for the Nokia BH-602, in which everything is right down to the "unfortunate" earloop. (The original rubber has "resolved").