depends what u can get where u r.
optiarc 72* and samsung or lg, pioneer, and liteon, those ones usually, much of a muchness, but the former about the 'best' burners, its very splitting hairs.
yes its been asked 1000s of times, and now most of those q's don't get replied
don't get too hung up on it. just go for one, it'll be ok, and if you get a dud, don't write the whole make off. it happens.
u can get 2 samsung 203s if u don't mind one brand, or b interesting and an optiarc and a sammy perhaps.
up2 ur good self.
poeple say the sammy 223 isn't as good as the 203, ditto with the pionner 216, v 215, I am not sure its massively significant.
so if u really care, sammy 203 and pioneer 215, if not, the 223 and 216.