I dunno man,
I used the gecko 201 in the field summer, and you can get the multipane trip computer display w/ custimizable fields... you can even get it to do UTM/latlon simultaenously.
As for the net cables.. there's more than one distributor, i've got a 12V power/serial cable from mrplace on ebay. Works great.Total cost was about 10-15$ with shipping.
I mean its not the greatest GPS but its inexpensive, totally waterproof (unlike the Etrex series where the batt compartment isnt really waterproof) and very light - though batt lfie is about the same as the etrex's