A few years back, I was having a lot of problems with quality on store-bought DVD-R media. One batch would work fine, the next spindle would have all kinds of rejects. I had a software utility that would read the manufacturer code from the discs and found that identically packaged discs from the same wholesale club were from two different manufacturers, just re-branded!
I switched to Taiyo Yuden and never had another coaster. Also, the Water Shield discs have a nice glossy surface for inkjet printing. That said, due to recent economic issues, I’ve gone back to the wholesale club and the Verbatim brand have been working well, as the other poster mentioned.
Also, note that JVC and Taiyo Yuden just joined forces and the discs are now being branded as JVC, but same Taiyo quality.
About size, some players have issue with the dual-layer “DL” discs, usually better to stick with 4.7GB DVD unless you have a very long program and need the extra space.
At 60 minutes, highest quality encoding, a 4.7 disc is fine. Even at 90 minutes it will look good, and in fact I often go 2 full hours on a 4.7, so you will be fine. A quality encoder is important though, that can make a big difference in final product
Jeff Pulera
Safe Harbor Computers