Our company is looking to create 3D models of our piping facilities and I was just wondering if anyone out there could give me some advice on what program to use. We've been experimenting with regular AutoCAD for the modeling but would like to maybe look at other 3D software.

You are asking in the right forum - Autodesk Inventor Professional and its Piping functionality might be the right solution for you.

Yea, Inventor Pro does have a wheatfield of piping stuff but be careful using their "standard" valves, etc.  You'll probably have to create your own (or modify one of theirs) if it's important to your presentation.  FYI, to make sure the piping/tubing commands are available, go to Tools-Add ins and force the "Routed Systems: Tube & Pipe" to Startup/Loaded.
 
If you're really conversant in 3D, get ready for a whole new train of thought with constraints, parents, children, & etc.  It's a whole different world out there with Inventor but once you get used to it (in 2-3 years) you'll never go back to AutoCAD.  I suggest you invest in a training course.  My first one was 1 week long.  They really didn't teach me how to use IV but they showed me what it can do.  Then read like heck.  I use dual monitors so I can have the tutorial on one screen and the program on the other.  Well worth the investment.