I just got a new Garmin GPS to use on my next WCPP trip. I'm looking for the best source online or otherwise for the Canadian Topo maps on DVD. I saw there was one option that was central Canada pretty reasonable... Like $80.00 But not sure how to know if the retailer is a good one to work with. Are the Topo Canada all 1:100,000 scale? The salesman at REI was not very helpful... I was dissappointed.