I’m just going to shoot down the 20x idea and tell you that it’s a crapshoot to get media that will consistently burn great @ that speed.
In fact, 18-20x is a load of crap that does the following:
- Saves all of 30 seconds over 16x
- Makes coasters far more likely to occur
- Burns with higher errors in most, if not every single case
- Is not supported by any disc (16x is the fastest media available)
So I would suggest burning @ 12x max. 8x if you want to have the safest and highest quality burns.
So unfortunately no, there’s no actual media that supports anything above 16x. I consider 16x too fast and personally never use it. Are your goals to get the best quality burns possible? If I were to use the Verbatim IJ printables to print onto, I’d want them to be burned well enough to be read by most players, otherwise it’s a waste of time, money and ink.