Hey Matt, welcome to the forum
I have two 223x drives (one a "proper" Sammy, the other a Dell rebadge)....they work nicely enough for me (DVD burning - I have an Optiarc drive that handles CDR duties). Not outstanding drives, but not bad either - certainly very tolerant of mediocre media.
But I guess this is pretty much irrelevant now the order's been cancelled, hehe (Note to self: read all posts in a thread!)
BTW. I'd keep hold of the 183
Regarding having two identical drives - I would go for different models/manufacturers - reason being, one drive can make up for any weaknesses the other may have (such as not being a great CD burner, not being a good reader/ripper etc etc).