Interesting, i want my machines as close as possible to original so had to have glass repro qualiy, I believe that this is as good as it gets for what is available and you can afford or justify the cost.
My rocky had a really poor vinyl print stuck on a piece of glass with clear glue in the corners.
I then got the best picture of Rocky I could get off the web and had it printed on glass. The printer asked for a high res shot but where do you get it from? He did the best he could with what we could scan, but was never good enough for me, however no one noticed.
Trans light or Perspex is fine IMO depending on budget and how close you want to get to original. Well worth digging out info and posting.