I did try some time ago the pictorico Premium OHP Transparency film, its completely clear with a cold blue tint to it.
Prints very nice, the pure blacks look almost painted, the only problem is that you get completely clear areas where is pure white in the image.
If I would have to frame these the backing board will be part of the image.
Not necessarily a bad thing, but something to keep in mind.
Specially if you do your own profiles, since at the time of reading the targets, you have to place something under it.
Hugo