It is said that the Liteons like the DVD+ media better. I have a Liteon and have only burned used DVD+ since the firmware is set to change the booktype to DVD-Rom for greater compatibility with stand alone players.
I have had great success with Taiyo Yuden and the Ricoh JPN's.
I wouldn't be using any Memorex media if I were you, it's a crapshoot of what your getting. May work fine now but when you take it off the shelf in 6 months that may not be the case, if crap dye was used it may have deteriorated. Media is cheap enough these days so for the pennies difference it's just not worth the risk.
All the big retail stores carry them so you may think they're good, but they're not.