I also have a 60csx and wouldn't trade it for almost anything
Be very afraid of the Triton - and that is from a die-hard Maggie owner. The software issues are significant. Looks like Magellan is doing a beta test in the market. Not good.
The Garmin Colorado looks like a competition killer but it will be top of the line and you will pay accordingly.
Unless Magellan fixes the software problems with the Triton quickly, they will be out of the handheld business soon.
GPS Magazine (yes, there is such a thing) really likes the Colorado