I love my 60CSx. Even though I have bought newer Garmin models like the 62, I still use the 60.
I have event written my own software, (that I give away for free) which is like but only better than "Access Field Notes" which is provided at GC.com for newer GPS units.
With my EGL software all you do when you get back from a day or week of caching is plug in the GPS, start up your browser and read your finds and DNF right from the GPS into the browser. The software gives you a listing of your finds and DNF in the order in which you found them. It time stamps each find for you. It tells you how long you spent searching for the cache. It gives you the find # out of how many finds for that day. You get all this in a pre-formatted text that you can copy-n-paste right into the online log.
Here's the best part you get two links one takes you right to the cache page the other takes you right to the logging page. No more logging on the wrong cache because you typed in the wrong gc code. No double logging the browser page shows which caches have been logged and which still need to be logged.
In addition to this there is a bunch of other tools and stuff you can do to customize your logs. If you create a field note on the GPS like "Dropped coin", it get uploaded with your data. It uses 4 different icons to either mark your finds or DNFs. You can also mark a find on a cache that needs maintenance, when you upload your data you get a reminder notice you can either edit or just cut and paste right into your log notes that the owner needs to maintain his cache.
You can create two standard notes that can be added to the other pre-formed note I described above. Say for example you were out caching with a group and you wanted to enter "Caching with so and so today.....", you type that message once and it gets added to each of your finds. You can create a second note and add it to all your DNFs.
And if you want to see where you went and where the caches were located, there is a google map imbedded into it. With that you can display your track and all your finds and DNFs along the route.