Two words: Taiyo Yuden.
The most compatible, most reliable.
After that, Verbatim. They are great, and very consistent.
And, for less money, but usually ALMOST as good, are the Riteks. But you have to be careful with those, as Ritek went through a bad period briefly with their GO5 discs (8X DVD-R) last winter. They admitted this publicly, explained what the problem was, and solved it. They made quick moves to fix the problems, but it still meant there were some problematic discs in the supply pipeline, and of course one worries if the dealer you happen to purchase from has still has some on the shelf since that time.
Then, even with the Taiyo Yudens, you must take care to buy from the reputable dealers -- to avoid the flood of counterfeit ones that are out there since last January. Whatever you do, do NOT take chances on them off of E-Bay. Purchase from Rima, or Supermediastore, and you will get the real thing.
All of the above are merely my opinions, but then, the same is also true of every other response you will get to this question.