I only use +R due to the capacity of the booktype to be changed to "dvd-rom".
Otherwise, I don't feel it makes much of a difference.
Here's what you should be using:
CD-Rs = Maxell CD-R
Pro (Taiyo Yudens with a protective coating), Verbatim Datalife
Plus, and Taiyo Yuden
DVD±Rs = Maxell Broadcast Quality Series 8x (not regular junk Maxells you find everywhere . . . I'm not sure if these are being made anymore), Verbatim Datalife Plus (avoid Ritek made Verbatims; these might be fakes), and Taiyo Yuden (not Valueline, not Trublu) 8x
DVD+R DLs = Verbatim made in Singapore (preferably not India) and MAM-A 8x
These have a special anti-scratch coating:
1. Taiyo Yuden (That's) Triple Guard (sometimes called "Triple Coated" in the U.K.)
Good luck finding these in North America (someone may be able to special order them for you). They are sold in Japan.
2. Maxell Broadcast Quality -- very expensive and not easy to find (I'm not even sure if Maxell Japan still makes them)
Maxell (X-Treme) Protek also has an anti-scratch coating
3. Verbatim Videguard -- not cheap either, but you can find them at Amazon
4.
Century Disc Archival Gold
5. It's possible that Mori Media in Japan also produces something with an anti-scratch coating, but I'm not overly familiar with Mori media (but Mori is another premium brand)
This stuff with anti-scratch coating may run anywhere from $2.80-$7 per blank