the ones for authoring are the best -- but they cost between 15 - 20 $ a peice
TDKs, SAMSUNG, Verbatim are the best in the general use catagory
samsung being the cheapest and verbatim being the most expensive
samsung is the one the government and NASA uses ( in case thats important to you )
cdrinfo.com has a good forum on the subject of blank media
also this is the cheapest site ive found for blank media
http://store.yahoo.com/cdrdvdrmedia/dvdr.html
ive used princos -- they are shit - but they DO work - ive used the 1X 2X and 4X disks -- 4X was the best then 1X --- 2X was the worst, out of the 10 pack i bought only 5 worked
edit: i forgot to mention - it also depends on your burner -- i have the LG4020B and everythign worked in that -- the older poineers and sony have trouble with some media -- i mean all the time not like in my case with those 2x disks -- i think that was a disk problem - cause those 5 disks that didnt work - did work after leaving them in the car on a sunny day for an hour
2nd edit ::: forget about what i said about dvd-r for authoring -- dont even look at those unlss you have a authoring drive