Whichever one you are at one a day with decent weather.
On the day, look up. If you can see the top of the gondola from the valley bottom, go for it - the views will be great.
For now, go up two levels to the Canadian Rockies forum. Put “which gondola” into the search box at the top of the forum. You’ll see a lot of threads discussing the relative merits of the gondolas, but the main advice remains the same - pick the first one where you get good weather.