I'm thinking of picking up a Mac Mini. I've heard that the new ones perform a little slower than last years model. I'm not too concerned about a slightly slower machine, but not to worried about an older version either. I've got a large Amazon Gift Card balance, so I'm leaning towards a new model from Amazon. But, any pros or cons to this? Amazon has tons of options available, anyone that knows a little more about the models want to help me out?