PNY are the biggest POS cdrs I've ever had the non-pleasure of using. I bought a 50 spindle about a year ago and still have around 20 left because I don't use them, except for an audio cd now and then.
Imations - never had a problem, have 90% of my stuff backed up on them.
Fuji (TY) - never had a problem, have quite a bit on them.
TDK (TY) - no problems.
Memorex - had a few probs with them, but have some that work fine after a year...
HP 4x2x32x, now HP 10x4x32x...using EZCD 4-5, CDRwin, CloneCD...