I might be of a little help there with the bells and whistle part. I teach a course on the GPSMAP 76 and from what I have read the 60c doesn't that that many different features. Let me know if you are attending the meet/greet in Burns Park and if you want I'll bring you a course book.
I have the GPSMAP 60c and it has more bells and whistles than I caa figure out plus a hugh screen and made for caching,plus its color with lots of maps to buy. The only draw back is I bought mine on ebay for $350 but it was worth it.