Which Mac mini works best as a media server?

[iMore.com]

Using a Mac mini as a media server is very easy and very doable, but it does have some limits.
The Mac mini is versatile enough to use as a home media server or small business workgroup server ?*you just want to make sure you're getting the right Mac mini for the task. Aim too low, and you might not get the higher performance you need. Aim too high, and you may be spending more money than you need to spend.

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