There are many CAM options, but if you are using Rhino for CAD, you proabably should stick with the plugin RhinoCAM since it operates within Rhino. Easy to use the same interface that way.
That said, most CAM software will accept files from many different CAD programs. I use BobCAD for my CAM software, using SolidWorks for CAD.
There are literally thousands of threads on here about "what CAM should I use". A bit of searching will get you any opinion you want...