Sure, Davis does some strange things with their model numbers to denote bundles and the station w/o the console and such.
The 6250 is the complete bundle with what they call the "integrated sensor suite" and the console.
You would also need what they call the data logger - which plugs into the back of the console OR into their wireless weather envoy. The logger is usually sold bundled with their PC or Mac weather software.
I went with the 6250, a weather envoy and the logger and used software I already had (weather snoop on a mac) and am very happy with the setup. The advantage the envoy gives you is that you can have the console in the house somewhere, and use the envoy to connect the station to your computer for transmission to weather services.