A GPS can also be helpful for finding unmarked trailheads as well as summits...
The first decision would be mapping or non-mapping.
A mapping unit:
* displays your current location, track, and nearby waypoints on top of a map,
* Locations easily transferred between map and GPS by inspection.
* Has a simple basemap, you have to buy topo and/or road maps and install them from a computer
* Can transfer waypoints, routes, and tracks to/from a computer.
* Get a color display. Much easier to read.
* You will need to purchase Garmin digital maps to load onto the GPS. (Which can also be viewed on your computer.)
* Top of the line Garmin 60CSx can be purchased for about US$300. (There are cheaper units with fewer features.) Topo USA 2008 for ~US$80. A 2GB micro-SD memory card <US$20.
A non-mapping unit:
* displays your current location, track, and nearby waypoints on a blank background.
* Locations transferred between map and GPS by numerical coordinates.
* Cannot load or display maps. (You can put in some waypoints for goals/orientation.)
* Can transfer waypoints, routes, and tracks to/from a computer.
* B&W display ok.
* I suggest you get digital maps (viewable only on the computer). You can transfer waypoints, routes, and tracks to/from the GPS.
* Garmin eTrex H can be purchased for ~US$90
General:
* Get a "high-sensitivity" unit. Don't even consider a non-high sensitivity unit.
IMO, The mapping is
very worthwhile. The GPS is much easier to use.
This topic has come up many times.
http://www.vftt.org/forums/showthread.php?t=26163 gives some additional info, but it focuses on basic non-mapping GPSes. Another is
http://www.vftt.org/forums/showthread.php?p=217412 (which contains more links). To search for others, you will need to use Google advanced search--the search engine on this BBS does not index the acronym "GPS" (or any other 3-letter words).
In the Garmin line (I'm not up on the details of other manufacturers lines), I'd consider the following:
* Non-mapping: eTrex H
https://buy.garmin.com/shop/shop.do?cID=144&pID=8705
* Mapping: 60CSx, 76CSx, 60Cx, 76Cx, eTrex Legend HCx, eTrex Vista HCx
https://buy.garmin.com/shop/shop.do?cID=145
Route planning is essentially the same whether you use a GPS and/or M&C to execute the route in the field.
Doug