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I went with the Lacie Blu-ray slim external. It's USB powered so it's easy to plug in when needed.
 
I've got an Apple brand that I found on eBay for $45. My wife seems to have stolen it for her own use (she needs to burn CDs a few times per week), so to keep at work (for my '11 Mac mini) I bought a $29 Samsung slim DVD burner that so far works perfectly.

I probably wouldn't spend the $79 for Apple's drive unless I really wanted the looks (which is not an unreasonable thing, by the way).
 
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