Check out MIO, well designed, good solid mapsets. All come with the SIRF star 3 antenna and the full ability to use it. You're able to do a search based on address and coordinates. POIs can be sought out using current location or destination, routing based on fastest, shortest or economy (measures time vs. distance uses best combo of the two). Software platform is based on Windows CE, much more reliable than either TomTom or Garmin OS.