Question for ya'll.

As an owner of my beloved X5, I am trying to find out, do I need a balance and/or alignment done?
I bought the X in August last year with summer rims/high performance summer tires. When we had a in September I realized I needed winter tires. So I bought rims off kijiji and brand new winter tires from Kal Tire. Kal tire installed it all. Now, with winter hopefully nearing an end, I want to put my summer rim/tire combo back on soon.
Now, do you guys think that I need to get this setup either balanced, aligned, both or neither? I don't want to see my summer tire setup (or winter obviously) wear out prematurely or not act to it's full performance as each tire is very costly.

Thoughts?
Also, I ask because,
1) I have never owned a awd vehicle until this one
2) I don't remember the last time I had a balance/alignment on any vehicle