Look, in sum the Bahnhofstrasse is Rodeo Drive on steroids. Ok, that is a bit of an exaggeration…read morebut my suggestion would be to start at the end closest to Lake Zurich and stroll with your "baby" on the Bahnhofstrasse toward the train station. Get ready for some of the best shopping on this planet.
A simple Truth
Look Major Dudes, if your "money is funny," or if you are behind on child support or are currently experiencing financial difficulties don't take "baby" down this street because it will cause depression. On the other hand, you might consider a hotel in Kloten and using the hotel savings to shop.
I would make sure I stopped in on Bally (I mean you are in Switzerland, right) and believe it or not there are a couple of moderately priced shops like Vero Moda and Mango just off the Bahnhofstrasse. Also, go to Jelmoli. This department store is "right in the mix," has something for everyone's budget, and has a great buffet restaurant and bar.
On the Other Hand
For those travelling "with coin" the selection in Bally of Switzerland is unbelievable, this is the nicest Bottega I have ever shopped in and only Louis Vuitton in Paris is better than the Bahnhofstrasse store.