Memorex is a total craphoot, you never know which discs you get (can be MCC, CMC, Prodisc, Ritek... anything!) - don't bother.
So in your case, I'd go for the Sonys I guess.
Though maybe if you tell us where you live, we can help in finding MCC004 Verbs at a nice price... - I'm actually surprised that the Verbs would be more expensive than the Sonys and Maxell, here it's the opposite.