Ultimate has dynastar (4800, 8000,8800 +others) and some atomic. I haven't rented from the ski stop but I know they have rossignol B1s and B2s. Ski cellar is in Calgary on the way to Banff. They may only have lower end stuff (thats all I rented from them)
Post what brands you're interested in and I can let you know who has them. I would recommend still bringing your own boots. Nobody rents more than intermediate level boots and they've been worn by about a million people. Bring boots, rent skis.