Arnie,
If you use, and like, nroute I can guarantee that GPSGate works great with the MS receiver talking to nroute. I looked at the GPSGate site again and I'm positive that once it's installed it would also allow your 60C to talk to S&T (eg. Garmin GPS to standared NMEA application), so you could have it both ways: grab whichever receiver is handy and have it talking to both nav programs, simultaneously if you wish. Did I mention before how easy it is to use? And that it has a free trial period so you can just toss it if you don't like it?
I bought Microsoft Streets and Trips 2008 (on sale, too) mostly for the receiver because I have a bunch of Garmin maps for my iQue 3600 that I can use with nroute on my laptop, but didn't have a receiver for my laptop. As you discovered, this was a quick and cheap way to get a good one. I'm still playing with S&T and if I ever figure out how to use it I might decide that the software and maps are a minor bonus.
Whatever you decide, I'm glad you have something that you are already happy with. Good navigating!
...ken...