Hi I have owned the nu-vista 3D for about four months now and you are right it is an incredible player. I am surprised there isn't more talk about this player. I know they are getting close to their 500 max limited edition pieces. The player gets even better with time. The highs take on a much more natural sound and the brightness subsides.
Anyway, to answer your question regarding the clicking, mine clicks also after each time you described. It must be normal. After a while you just get used to it. I am not sure about changing the tubes but I don't think you have to worry about it for a long time. Enjoy your new player!
Anyway, to answer your question regarding the clicking, mine clicks also after each time you described. It must be normal. After a while you just get used to it. I am not sure about changing the tubes but I don't think you have to worry about it for a long time. Enjoy your new player!