My recommendation for going farther north is purely for easiest access to what seemed to me to be the most spectacular scenery (the 4 parks: Banff, Jasper, Yoho, Kootenay), more than the shopping. I did enjoy learning about ammonite jewelry (!) but I wasn't as taken as many people are with the town of Banff, though it was a very international destination and nice to hear lots of languages spoken on the streets, and there's a great music festival there during the summer, including some wonderful artists from my world, Carol! (A week after our stay, Linda Tillery & the Cultural Heritage Choir had a concert, if you know who they are.) But mostly we enjoyed staying in Banff because we loved taking in the National Park sites and hikes.
We hadn't explored what was on the way much, and I was curious about Fairmont, so googled a bit and first up was this seemingly Dutch website, whose links don't work, but interesting reading. They only give accolades and superlatives about the 4 park area
www.pacificislandtravel.com/north_america/canada/about_destin/britishcolumbia/canadianrockies.asp
but here's what they say about Fairmont Hot Springs themselves and its origins (scroll to bottom), which I'm sure isn't exclusive to that area, and just made me think for a minute because I bet that many of our most beautiful natural resources have a similar history:
www.pacificislandtravel.com/north_a...estin/britishcolumbia/fairmonthotsprings.html
I do think Fairmont Hot springs would give good access to Kootenay, where we stopped a few times on our way up for a picnic and a little bit of wandering, and wished we'd spent more time there - it wasn't too crowded, and was stunningly gorgeous. Radium Hot Springs could be another possibility, RCI has a resort there that seemed to have good availability back when I was planning our trip, right at the edge of Kootenay.
As Victoria says, depends on your priority - I have a bias for National Parks, because trails seem better marked and information is more readily available, but that's just me. For instance, with a map, we tried to locate a trail in Canmore that we never could find. (And except for Banff, less commercial stuff. Lots of people are amazed that so much commercial development was allowed to happen inside the park of Banff.)