AppleCare Protection Plan – Mac Pro extends the complimentary coverage on your Mac Pro to three years of world-class support. The plan includes expert telephone assistance, global repair coverage, onsite repairs for desktop computers, web-based resources,

Apple Mac mini M9687LL/B 1.42 GHz PowerPC G4 provides what you need to have more fun with your music, photos and movies right out of the box. This Mac mini now boasts 512MB memory and includes built-in wireless. Get a Mac for Less The modular design of Mac mini lets you upgrade your current system to the elegance, simplicity and reliability of Macintosh. BYODKM:1 If you already own a monitor, keyboard and mouse, you can get up and running in minutes.

AppleCare Protection Plan MC256LL/A Mac Pro comes with 90 days of telephone support and one year of service coverage at an Apple-authorized repair center.

Apple Mac mini MC408LL/A Snow Leopard Server comes with these configure:
Memory
More memory (RAM) increases performance and enables your computer to perform faster and better. Choose additional 1066MHz DDR3 SDRAM options for your Mac mini.

Apple Mac Pro MB535LL/A Desktop delivers up to twice the performance of its predecessor. Offering maximum performance, it includes two hyper-threaded 2.26 GHz Quad-Core Intel Xeon processors with a new Turbo Boost feature that automatically boosts the processor clock speed based on workload.