OK, question for you guys who know more than I:
As I understand it, the purpose of having an external hard drive is mainly to keep system operations and engine on a different bus than the data stream, right?
The Mac Mini can be configured with dual 500Gb hard drives. Would that negate the need for an ext drive? I would imagine that it would require some pretty specific control over where data is stored... sometimes dual drives are seen by the OS as a single volume. But on the other hand, Mac stuff is generally pretty flexible.