Just got a burner (NEC-3550A) for Christmas, so I'm a bit new to all of this. I've played with various CD media for years, though, and with those, TY is indeed the best I ever found. I always snagged Fuji branded TY at Best Buy during their specials. $8 for 50. About $18 normally, which I've had to pay a couple of times. Sucks. But I've never had one coaster with them.
For DVD, I bought a 25 pack of Sony +R at Best Buy, again, due to a special. $8 for 25 isn't bad. I did a little bit of Googling once I got home, and they apparently aren't terrible. I've only burned a couple so far, but they seem to work fine. They actually go past their rating. They're 8x, but they burn fine at 12x. (BTW, the 3550A is an awesome burner. Somehow or another, it figures out as it's burning how fast it can go, and will even adjust the laser intensity. Also, it burns every format except -RAM, is 16x, and DL to boot)
The burner came with a 5+1 pack of Ridata, so I'll see how those are. The 4x +RW works great, I can tell you that. Been using it for my Xbox, and also for test runs of DVDs. Works fine in all our players. The other 5 are 2.4x +R DL discs. Free, so I can't complain. Haven't tried one of those yet, though. Too expensive to waste
I'll find something for them...