I just purchased a 495, (an upgrade from my 92..) And now that I started playing with it realize there is more to purchase! It doesn't appear to have a data card in it, and it doesn't show any detail (not even lakes) for my area..(Ontario). Is it best to just call Garmin? There website shows the data cards as not available. #@$%$@% !! Basically I want it to show as much detail for Ontario with the smaller lakes etc. How do I get it going? HELP!