Data Center/Racking Diagramming Software

Is there a software that you overwhelmingly (a) like, (b) find easy to use, (c) has stencils for everything, etc? I am doing a few things: diagramming (floor plan) of my data center and diagramming racks down to the “u”. Visio, while robust, has me running for stencils, let alone a good data center floor plan template w/ stencils.

SOX is killin’ me and not having this documentation makes me insane.

Do you have a favorite, the most fuctional one and/or suggestions for a good software?

Thx.