All I can tell you is I go by what works in my burners. I've had very good luck with these DVD+R 16x metalic on sale either online @Egg or in OfficeMax brick&mortar.
Many people swear up and down that the only way to go is TY. But it seems that every HP Pavilion I get, the burner only wants to burn TY 16x discs @2.4 or 4x. No TYs for me until I see some that burn correctly @16x.
In my last 3 PCs Verbatim DVD+R has burned consistently good @16x.
Your mileage may vary. I don't understand how they do the write strategies
for these burners. My new PC will only burn Verbatim 8x DL @4x, while my
old PC will burn the same discs @4-8x. But the new PC has better write
strategies for just about everything else but the TY. Go figure.