Pixie is small. If you can fine a bigger apple that taste similar, you may want to choose it over Pixie.
I grow a new apple called Crunch a Bunch sold by Gurney. It is very similar to Gold Rush but ripens earlier. I really like it. I also have Gold Rush so I can compare them. Nice balance sweet/tart. It ripens in Oct for me (could be late Sept if my tree had more sun). My GR ripens in Nov.and often not fully where I am, zone 6a.
You can get another apple that ripens in early Sept to go along. Most of apples I like are Sept/Oct apples.
Have you seen this thread?