Seems all the TDK discs I have are Ritek. Havn't ever seen one by anything else yet. Time to switch.
I've personally had a good experience lately with the TDK-branded RITEKF1 media, and I think they make for great duplication media. I would never use a Ritek disc as a master or archival copy, but for dupes I'll trust it.
2ND CLASS media isn't bad, it just isn't the best.
Office Depot had a great sale last week, the pre-Thanksgiving sale, at $17 per 100-pack, so I bought a pair of spindles for a dupe project. For my archival needs, however, it was business as usual, TY and Verbatim media bought from Amazon
What you get really depends on why you're using it.
RITEKF1 is generally better than the other commonly-found alternative, the all-too-crappy CMC media. (Not to be confused with MCC, of course!)