"Mini has better value - energy payback 16 mo., resale++"4.5 starson by mwarren_us
Pros: If you're like me and leave your computer on 24x7, then the energy savings alone will payback the difference in 16 months (11.4 cents/kWh) and after that the resale value will be much higher. Wifi and dual display further open the cost gap.
Cons: Most folks will need a display adapter, fortunately Apple selected a standard connector and low-cost online vendors like monoprice sells them for much lower prices. The HD could be larger.
Summary: The Mac Mini is a wonderful computer that packs a ton of functionality into a very compact space; my desk is once again a place to work instead of a parking garage for a huge metal box. Mac OS X is a joy to come home to after being shoehorned into Microsoft's products at work.