I'll echo the sentiments about TY media and also add Verbatim which is revered by many folks to be right up there with TY.
But ... there's more to your question than you may know. Good media may mean good quality scans (using Nero's CD-DVD Speed or kProbe software) or it may mean good-enough quality scans + good longterm reliability. Not all 'good' scannning media hold up for the longhaul.
Depending on what burner you're using, maybe check out the specific forum for that manufacturer in the dvd forum section. Check out scans, check out what people are saying about media compatibility, and check out which firmwares are performing the best for those media.