Our company is going through the process of selecting a CAM software to be used with our Vertical Machining Center. We have a Haas VF-7, and will be using it primarily to sink forging dies. This dies weigh a minimum of thousand pounds, and can be up for 24" x 24" with a depth of 12"s. The majority of modeling will be done in Solidworks.
I was hoping that some of you could give your input as both mastercam and Gibbs seem to be the most widely used, and have the best support.

Has anyone used both softwares or have input on one versus another? Thanks for your time!

Take a look at HSMWorks. It integrated in SolidWorks and easy to use. It is a Danish CAM program.