Just bought the Garmin Vista C from 'arry (thanks very much btw)and am well chuffed with it. Unfortunately I have been bitten by the gps bug and while initially I only wanted something to record my tracks so that I could download them onto google maps/earth now I want a decent basemap of my own to replace the bog standard one that comes with the garmin mapsource software. Few issues that I aint sure about! If I want to stick with the mapsource software is the only option available to me the £150 British Isles map that they are flogging or can you import other maps from elsewhere to use as a basemap on mapsource? The other issue is that if I move to memory map which is having a sale I can get a map for northern Scotland for around £48 which covers everything that I am likely to be doing in the future. However are the two systems fully compatible (Garmin/mapsource v MMap) or am I going to be left with the low res basemap on my Garmin that it came with?
Sorry if it is a little longwinded but want some advice before I shell out on new software.

Thanks MSP, pretty much what I suspected. I get an elevation profile as well as my tracks recorded from my GPS which is pretty much all I want. Not really bothered about trail satnav at the end of the day though I think I will splash out on MM for route management. Is it easy enough to import to Google earth from MM?

Yes. I think you just save it as a KML file and load it as such.