Hi Jack, I finally received my 76CSX last week. Display worked great on my bike today. I did prefer the option to use 3 small data fields on my plain 76, didn't take up as much screen space. My Garmin MapSource worked fine with the new GPS. DeLorme Topo USA 6 appeared to transfer my track data, but then froze the application. Word is that Garmin changed the USB protocol on the new X models