Looking for a good GPS under $600. Something that is user friendly, can accept down loads from the internet or CD-Rom.
Any recommendations?

Most of us on the board, myself included, have Garmin's.
Almost all of their models, even the hand-held units like mine, accept data from external sources. Price depends on features.
Look at various sites such as Boat U.S, Boaters World, West Marine, etc for price and selection.

Go Garmin...Really easy to use and full of features!
I'd reccomend the GPSMAP 76($349.99) for a handheld, it has a really good basemap(although I hear some of the inland features are a little off) but it can accept a wide array of cd and internet uploads. It's a really nice little chartplotter.

For a moderately-sized fixed mount(perfect for our style boats) check out the GPSMAP 176($499.00). This unit also accepts Garmin's "Bluechart" chips. This is ideal for all kinds of navigation. All the data is NOAA official and accurate.

http://www.boatus-store.com/mc_onlin....asp?IID=39616

http://www.boatus-store.com/mc_onlin....asp?IID=39612

Bluechart info:

http://www.garmin.com/cartography/bl...BlueChart.html

I have had good luck with the Garmin 182, accepts blue chart chips and also downloads from the various Garmin CDs. I use it during the summer as a fixed mount in the Velocity, with Blue Charts, and winter months I mount it in the Suburban and load the land maps. I have the model with the Internal antenna and have no problems acquiring signals, including WAAS.

I had a RayMarine 425 but returned it because of accuracy problems even after it was returned to RayMarine for repairs.

I'm using the Garmin E-map. Easy to use and a nice big screen too. Actually used the thing on our plane trip back from Florida. Pretty cool!

Thanks for the help. Garmin will be my choice.