Right now I am running a late 2008 unibody MacBook with a 2.0 ghz processor and 2 gb of ram. It has become quite sluggish in the past year and almost unbearable in the past couple weeks. I have decided I want a desktop computer, and I'm pretty sure it will be a Mac mini, but I'm not convinced. Will I see a huge performance difference from the MacBook? And will the mini last me very long before it too needs to be retired? I am leaning towards the i5 but should I go for the i7?