I'm another fan of the DeLorme products. It's fast, easy and extremely accurate - like scary accurate. My caching buddy has an OR300 and swears by it. It's a very nice unit but has its own quirks. They all do.
Some people cache by compass (me) and some cache by map. Some folks will love DeLorme and other will love Garmin. More than anything, I think, it's about what you learned with and what you're used to.