I burned a couple of games to Memorex and they working fine. Those were pre-patched games and I don't know if that made a difference, but when I had to patch them myself the Memorex discs didn't work on my Samsung. I reburned with Verbatims and they worked. So it's going to be primarily Verbatims for me for the time being with the occassion Office Depot disc when they go on sale.
I do Verbs, they're the best, or so everyone says.
I have been doing my last 2 copies on PENGO, i know, Crappy dvds, i remember a few years back i bought a 100 spindle of em, tried 30, none worked (really) but these DVD+R DLs work fine, so there you have it, cheap (not that much, i'd stick with Verbs) and they do the job.
Riteks didn't work, tried 3 of em, nothing.
(BTW, i only did the pengos because i ran out of Verbs ><, still waiting on package)