How many of you in Christian bands use a rack mount for your equipment?

I'm just trying to increase my general knowledge of rack mounts... I know there are some with wheels that are portable and then there are permanent ones that can't really be moved like server ones, right? If you use a rack mount for your band equipment what type is it and what equipment is stored in it?

Here's some info about rack mounts in general: http://kingdomincblog.com/rack-mounts-explained/