Please specify brand and dimensions (e.g. # of rack units occupied) as well as any unusual configurations (12 bay hot swappable hard drives, external storage unit, etc)
Use a Kill-a-Watt to estimate power draw during peak load.
Specify the number of IP addresses the server is likely to require.
Please explain your intended primary use.
How are you securing your box and keeping it up-to-date? What operating system / software are you planning on running?