I agree that gpspassion is a good site to check the stuff out. I can only recommend the Pharos at the moment because that's the only one I've ever used. I have several of the serial attached GPSs and they all seem to behave about the same for me... I know I have a TomTom and a Pharos. They are interchangable with the software.

One thing kind of nice with the Pharos that I just got is that the GPS itself can be used with different configurations. The GPS receiver itself (i-GPS360) is just this small puck. You can connect it to a USB cable and use it with a laptop, or you can plug it into the Bluetooth dock, or you can plug it into a CF adapter and use it that way. The only thing is that they don't seem to sell the cables separately, but I'm sure you could get them if you called. I don't know if you can use this GPS receiver with standard Y cables from Pharos.

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Mike - Been Converged?