Wow, I wonder if the original poster is wishing she never asked...
Real quick. I am new to geocaching and got interested as a way to find something fun for the whole family. Got a Vista HCx few weeks back and have now completed several caches. I love it. Simple to use (both 7 and 9 year old use it well), great signal, fast, nice colour screen and yesterday took me w/i 2 feet of a cache. It also has a very nice entry point at $214 and Amazon offered a 2gb card for $6 and a case for $10. The resale is also good on these if you wanted to upgrade later.