A little background. I started using GPS in 97 first thru Aviation. For street and trail use, I began with the old Garmin 3, then the 3+, then the 5, 276, vista, 276c, 376c and a handful of others. After a fair bit of research on this forum and others I settled on my latest GPSr the 60csx. My decision was based on what GPSr is best for geocaching. Most of my research was reading user reviews and testimonials, which nearly always points me to the correct buying decision whether its lawn equip or electronics. The research is actually part of the fun. After reading hundreds of posts and comments a clear picture always emerges, and in this case it was "the 60csx was brilliant for geocaching". So thats what I got. My son on the other hand had the issue of cost to deal with so he opted for the cheaper hcx legend which in my opinion was a strong and easy second choice.
Having started in GPS in the late 90's, many receivers were simply better than others. So my usual tests were slow speed walks, keeping a fix under foliage and around buildings, and the accuracy of waypoints. Of course in the old days many GPSr failed these tests miserably, but we didn't know any better and we used what we had. As technology improved holding your fix in sketchy situations continued to get better, as did the accuracy. Fast forward to today. The test between my sons hcx and my 60csx proved what my research told me. The 60csx acquires, holds a fix, and is more sensitive at low speeds of any GPSr I have ever owned or used. The hcx is close but there is a difference. In real world caching situations and in the hands of an experience user, the 60csx will consistently put you closer to your target.