Hi: I wouold say that no matter which you go for, Magellan or Garmin, in general you will get a good unit that does the job. In these forums you will find groups of people that are strong Garmin supporters, and groups of people that are strong Magellan supporters. There have been long back and forth debates from supporters of each, and I doubt very much that the arguments are going to stop any time soon. You can look for these arguments for and against both Magellan and Garmin in the archives of these forums. Then there are the people, like me, that like them both. Chevy, or Ford, they both do the job. I have owned several Magellans, and own a Magellan eXplorist 400 at the moment. I also have the adapter for it that allows me to use three AAA's if I wish. Having the option to use either the rechargable, or AAA's is great. I use the rechargable when I go out, but keep the adapter loaded with fresh Duracells in the case on my belt ready to go if I need them. I also own a Garmin Geko 201, that for its size and what I want it to do, is a fantastic little GPSr. I like them both. Wouldn't want to give up either of them.
Just do your research on them, don't rush out out and the the first one you think you will like, decide what you need it to do now, and what you might want to use it for later, and then decide. And have fun.