To the best of my knowledge, the films are actually Ektachrome 160T and Portra 100T, not Ektar 160T and Portra NC 100T.
What you should do if you will not really appreciate them is to sell them to someone who covets them. These are two of my favorite films, and my stashes have been depleted (especially the 160T, of which I only have 10 rolls remaining). If I would not have to ship them from Sweden, I would ask you to sell them to me.
They are good for all kinds of stuff; mainly long exposures and shooting with hot lamps or household halogen bulbs. If you are in a well-lit music venue where you can get an exposure at up to EI 800 or 1000, the 160T works great pushed 2-3 stops in medium format. (Maybe I shouldn't have told you that...now you will want to keep it!
) The loss of shadows does not really bother me in low light shots; especially in color. The reason the film is so great is that it is corrected for 99% of stage spotlights, so you get dead accurate color on your transparency. The problem is that you basically need a spot meter, and lots of experience, to expose and develop the film correctly for this kind of thing. Otherwise, your highlights get blown out from unnecessary pushing. Therefore, I wouldn't bother with it for this use unless you have a large quantity for experimentation. I'd use it for night pictures instead, or studio portraits using hot lights; possibly the low light pictures that you take. I would not use an in-camera reflected light meter if you plan on precisely pushing the 160T. 100T; sure, as it is a negative film, and won't be ruined by sloppy metering or too much pushing; but not the 160T. I'd use an incident meter, grey card, or spot meter instead.
It's a bloody shame that these films are gone.