Dave Caolo of TUAW wrote a paean to the Mac Mini.
This machine has been absolutely rock solid. ... In a world where the new and shiny gets most of the attention, the plain and reliable is often overlooked. So here's a post to meant to praise the Mac mini. The tiny, go-anywhere, do-anything, ultra-reliable computer that I absolutely love. No wonder there are racks full of them at Macminicolo and other facilities.
I use a Mac Mini (2009 base model upgraded with 4GB of RAM and a 500GB hard drive) as my main machine. I'd picked it up as a stopgap, imagining that I would get a Mac Pro at some point, but I find it completely satisfactory for the light-pro work I do (Photoshop and audio, but no transcoding, video editing or rendering), so it stays. When its life as a tiny, perfectly-formed desktop PC is done, it shall become a tiny, perfectly-formed home server.
If you meet the following three requirements, the Mac Mini is the computer you should buy.
• You don't play the latest games or use demanding professional apps.
• You already have peripherals.
• You don't want a laptop or a built-in display.
I'd even consider it if I preferred Windows to OSX, but only if I had a retail copy to install. Who could resist a Mac Mini carefully mounted on the back of a 30" Cinema Display? Apart from someone who likes money.