Or, a Airnav Radar Box, which in my opinion is much better in the US than SBS-1. If you live in US, get Airnav, not SBS-1.
The only reason I have a SBS-1 is because I am running a feed for it and got it for free; all the things I have tweeked for the software, the setup, and the computer make it run amazingly, on Plane Plotter, JSTARS, and a few other programs. It's tweeked enough to make me very happy with the setup and the coverage.
Flight Tracker | Real Time Airline Flight Tracking Software | Mode-S ADS-B Receiver