I just recently got an R200 and a spindle of Prodisc8x -R's for Xmas.
I had a Liteon 451's that I had been happy buring with for quite some time. I used Maxell 4x-R's (TYG01) for the longest time and eventually switched to Smartbuy 4x-R's (ProdiscS03) and had 100% success with all my set top boxes.
However, switching to printables (ProdiscF01) give me nothing but grief. I flashed that Liteon to the 451s@832s (VS0E and CG4E) after a ton of different write strategies could not make anything but coasters. I even went as far as to buy a DVR 108 (f/w 1.14 and 1.18) and although scans looked better, after 3GB in the PI's>800. Even Prodisc 4x-R's were terrible (MCC01RG20).
There is not a lot of printable media widely available where I am in Canada. But, I will have as much as I can get a hold of to play with. I did a DQ scan on my first disc off the 3520 today and was real exited with the results, ony to watch it pixelate and stutter in my set top box today.
My appologies, as I did a few DQ scans in my 163D Litey, from now on I will do them in the 451's so media code, etc. is in the attachment.
Here is an Oniditech 4x-R printable: