Hey! I too have a Magellan Meridian Platinum! Love it, but she's showing her age (like I ain't!) I actually like the monochromatic display as I feel it reads better in harsh sunlight.
At work, we use Trimble Geo XT's and XM's with Trimble's GPS Pathfinder Office software to extract the GPS data. All of our GIS is done in ESRI ArcGIS software, pretty much the professional standard. However, the majority of our Fire and LE personnel have Garmin GPS receivers. The 62 series is the most popular:
https://buy.garmin.com/shop/shop.do?cID ... 01&ra=trueThe best part about using the Garmin receivers that they have a free software application available to them developed by the Minnesota Department of Natural Resources called Garmin DNR:
http://www.dnr.state.mn.us/mis/gis/tool ... armin.htmlThis hardware/software combination is what many Fire and LE agencies use for their GPS field data gathering. The use of these are taught in Incident Command System classes for the Wildland Fire GISS Position.
Using the Garmin DNR software in conjuction with another free application, GPS Babel, gives one the flexibility to move GPS data in and out of many different mapping software programs:
http://www.gpsbabel.org/DeLorme products are a good choice at the consumer price level. Their Earthmate series of products comes highly recommended, although I personally do not use them at this time.
I haven't had occasion to work with any Nuvi products at all, so I don't know anything about them. Tom Tom products are for city-folk in pavement-only vehicles, in my opinion.
I'm saving up my pennies to try and acquire a Garmin 62s as my next personal GPS receiver, but I'll hang on to my Platinum until the buttons fall off. There are many sites on the Net that have Magellan Meridian tricks and hacks, so I should be able to keep her running for awhile. The Magellan GPS data format, however, is just not the one that caught on, so either the Garmin or the DeLorme products are perhaps the best choices for now.
Hope this information is helpful.
Desertroad