These just seem to get cheaper all the time, although, this one is only DVD-R/RW, whereas some of them also have DVD+R/RW. I have to admit, I don't really know the difference, so if someone could enlighten a prospective buyer, and also give an opinion of the Asus, it would be appreciated!
http://www.novatech.co.uk/novatech/SpecPage.html?ASU-DVDMB
The differences in +/- pretty much come down to who you believe
DVD- (which prefers to be called dash and not minus
) is the approved standard of the DVD consortium (along with DVD-RAM). It comes in two flavours -R and -RW. Which, much like CDR, stand for recordable and rewritable. Just think of them as CDR.
DVD+ well Philips decided that it was taking too long to get a DVD standard for recordable formats and came out with their own. The standard allowed for faster writing (2.4x instead of the 1x and 2x of the -R group) and, according to Philips, was more compatible with home DVD players. Once again the +R is a write once format while the +RW is rewritable.
Due to there being more recorders that used the - format the discs tended to be cheaper while + carried a premium. Compatability wise they are pretty much the same (although a lot of the cheap import players don't seem to play -R all of a sudden...hmmm).
They are pretty much of a muchness these days.
BTW the NEC +/- 4x from svp is currently at £89.98 and its 99p shipping again this weekend (also their policy is that if prices drop inside 7 days they will refund you the difference).