Well, I used to have a Magellan Sport Trak Map that worked adequately for me. All my friends with Garmins seemed to get and keep satelites while I was praying to the GPS gods to please at least figure out what state I was in. I say I used to have the Magellan because it fell off my pack while I was hiking and now it is gone. No really... It did fall off... I even had prior wife approval to purchase a new unit anyway without losing the old one...
Anyway, I decided on the Garmin 60C. I cannot say I have done side by side tests but I've taken the 60C into areas my SportTrak never could keep a lock and the Garmin just kept humming along.
I've found some good Garmin 60C advide in DejaNews (http://www.dejanews.com). Just search on Garmin 60C. There is a guy there who has posted his side by side comparisons of his SportTrack Pro and his Garmin 60C.
I do like my new 60C (especially the feature that allows me to put my name and phone number on the start up screen).