I have a Magellan Meridian Gold and the Mapsend Topo cd and it works great. There are lots of Magellan & Garmin units you can load maps into. I went with the Magellan because of the expandable memory via the SD card slot & Price. Got the whole package of the GPSr, mapsend Topo Cd, & 512 SD card for $285 from gpscity.com