What i have now is a Garmin GPSMap 172C..it is a good unit but i can not plug it into my computer and download waypoints on a trip to a new area that i would like to make. The other morning i made a 5 mile trip run in mostly heavy fog..i feel quit comfortable relaying on my GPS tracks..( trip lines from previous runs of the same area )...to find my way there....but each year i find the 5 inch screen getting harder to see..could anyone recommend a GPSMap unit with a screen ...8 inches and is programmable. Thanks Tug