both Asus and LiteON burners are good, however the LiteON drive has better error correction capabilities then the ASUS, although the ASUS also has 100% C2 accuracy! They both support overburning to 99min and can play it back again. The LiteON has the benefit of K-Probe and CD Doctor testing software, but that may not matter to you.
check out the hardware review on the Asus 52x drive over at cdrinfo.com for more info on the ASUS drive, and look at 52x roundup number 1, so info on the LiteON 52x drive (well, ok, they are reviewing the Sony model, but that is a made from a LiteON anyways!)
as for DVD-ROMs...I know the LiteON 166s had INCREDIBLE compatibility with DVDs of ALL sorts (ok...not DVD-RAM). I don't know if the same is true for the Asus DVD-ROM drive though.
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R
The Progression of Computer Media