xtbk9999

hi, new to the forum. anyone know what's the general lifespan of the lens on recording unit? the more often you use the unit to record/write discs, the less lifespan for the lens is likely to be? have had my NH700 for almost 2 years now, always feel that it might breakdown anytime. when reading about people's fault units so I now use my old R700 for playback sometimes, just don't want to use the NH700 so much. also deciding to get a EH70 later, how does the sound quality compare to NH700?