The Yaesu VR-500 is a good unit that tracks all frequencies and can be used as a scanner and radio, but this unit is now discontinued. You can still find them for sale on the Internet. My second suggestion would be the QTR-6000 by Quick Track, a little larger than the VR-500 but is a solid unit that tracks all frequencies as well.

I don't think the quick track system will track 222. The Magnum system will.