That is because everyone has different opinion on what is "better".
IMHO for cheap the 411S/451S is a good choice. Its worked like a charm for me. (plus you can overclock them to a 811S/851S if you feel like it).
Whatever you do make sure you research about media before buying any. I would say about 75% of the media out there is grabage.
Don't worry, if you wait long enough someone will come along and tell you that LiteOn sucks and to get a Pioneer. Then someone will say that Pioneer suck and to get a Sony. Then someone will say that Sony Sucks and to get a NEC. Then someone will come along and say NEC sucks and to get a LiteOn.
Have you read any of the reviews found here? They are a good place to help you reach your own conclusion.
Either way though I wouldn't get the Iomega. If for no other reason than community (us) support won't be nearly as good compared to the other popular drives (LiteOn,NEC,Pioneer etc).