A special on Riteks will depend on what burner people use, I suspect. Riteks do good on my px-716a, although they seem to do better on my Pioneer DVR-108. Also, Ritek's quality in terms of their spindles is sometimes a toss-up. I'm toward the bottom of my 2nd 50 pk, and I'm finding although they burn ok in my px-716a, their quality varies, and you can't always write them at rated speed; you usually have to write them one speed below (8x at 6x) b/c of the quality variance.
I just got some Verbatim DVD+R 8x from Amazon, but have yet to burn any. I can say my Fuji 8x DVD+R Made in Japan y000t02-00 mids are stellar compared to the Riteks and those TYs are superior in PIE and PIF. What it comes back to is testing your burns for jitter, PIE, PIF to see which disks burn with best results on your computer, so you know which media is better.